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Mellaerts S, Bellani C, Hsu WF, Binetti A, Schouteden K, Recaman-Payo M, Menghini M, Rubio-Zuazo J, López-Sánchez J, Seo JW, Houssa M, Locquet JP. Confinement-Induced Isosymmetric Metal-Insulator Transition in Ultrathin Epitaxial V 2O 3 Films. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38683636 DOI: 10.1021/acsami.3c18807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Dimensional confinement has shown to be an effective strategy to tune competing degrees of freedom in complex oxides. Here, we achieved atomic layered growth of trigonal vanadium sesquioxide (V2O3) by means of oxygen-assisted molecular beam epitaxy. This led to a series of high-quality epitaxial ultrathin V2O3 films down to unit cell thickness, enabling the study of the intrinsic electron correlations upon confinement. By electrical and optical measurements, we demonstrate a dimensional confinement-induced metal-insulator transition in these ultrathin films. We shed light on the Mott-Hubbard nature of this transition, revealing a vanishing quasiparticle weight as demonstrated by photoemission spectroscopy. Furthermore, we prove that dimensional confinement acts as an effective out-of-plane stress. This highlights the structural component of correlated oxides in a confined architecture, while opening an avenue to control both in-plane and out-of-plane lattice components by epitaxial strain and confinement, respectively.
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Affiliation(s)
- Simon Mellaerts
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Claudio Bellani
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
| | - Wei-Fan Hsu
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Alberto Binetti
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Koen Schouteden
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Maria Recaman-Payo
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Mariela Menghini
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
- IMDEA Nanociencia, Calle Faraday 9, E29049 Madrid, Spain
| | - Juan Rubio-Zuazo
- BM25-SpLine, ESRF, 38043 Grenoble, France
- Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid 28049, Spain
| | - Jesús López-Sánchez
- BM25-SpLine, ESRF, 38043 Grenoble, France
- Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid 28049, Spain
- Departamento de Electrocerámica, Instituto de Cerámica y Vidrio - Consejo Superior de Investigaciones Científicas (ICV-CSIC), Calle Kelsen 5, Madrid 28049, Spain
| | - Jin Won Seo
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
| | - Michel Houssa
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
- Imec, Kapeldreef 75, Leuven 3001, Belgium
| | - Jean-Pierre Locquet
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
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2
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Nanoscale self-organization and metastable non-thermal metallicity in Mott insulators. Nat Commun 2022; 13:3730. [PMID: 35764628 PMCID: PMC9240065 DOI: 10.1038/s41467-022-31298-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 06/10/2022] [Indexed: 11/08/2022] Open
Abstract
Mott transitions in real materials are first order and almost always associated with lattice distortions, both features promoting the emergence of nanotextured phases. This nanoscale self-organization creates spatially inhomogeneous regions, which can host and protect transient non-thermal electronic and lattice states triggered by light excitation. Here, we combine time-resolved X-ray microscopy with a Landau-Ginzburg functional approach for calculating the strain and electronic real-space configurations. We investigate V2O3, the archetypal Mott insulator in which nanoscale self-organization already exists in the low-temperature monoclinic phase and strongly affects the transition towards the high-temperature corundum metallic phase. Our joint experimental-theoretical approach uncovers a remarkable out-of-equilibrium phenomenon: the photo-induced stabilisation of the long sought monoclinic metal phase, which is absent at equilibrium and in homogeneous materials, but emerges as a metastable state solely when light excitation is combined with the underlying nanotexture of the monoclinic lattice.
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3
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Thees M, Lee MH, Bouwmeester RL, Rezende-Gonçalves PH, David E, Zimmers A, Fortuna F, Frantzeskakis E, Vargas NM, Kalcheim Y, Le Fèvre P, Horiba K, Kumigashira H, Biermann S, Trastoy J, Rozenberg MJ, Schuller IK, Santander-Syro AF. Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V 2O 3. SCIENCE ADVANCES 2021; 7:eabj1164. [PMID: 34730993 PMCID: PMC8565841 DOI: 10.1126/sciadv.abj1164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
In solids, strong repulsion between electrons can inhibit their movement and result in a “Mott” metal-to-insulator transition (MIT), a fundamental phenomenon whose understanding has remained a challenge for over 50 years. A key issue is how the wave-like itinerant electrons change into a localized-like state due to increased interactions. However, observing the MIT in terms of the energy- and momentum-resolved electronic structure of the system, the only direct way to probe both itinerant and localized states, has been elusive. Here we show, using angle-resolved photoemission spectroscopy (ARPES), that in V2O3, the temperature-induced MIT is characterized by the progressive disappearance of its itinerant conduction band, without any change in its energy-momentum dispersion, and the simultaneous shift to larger binding energies of a quasi-localized state initially located near the Fermi level.
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Affiliation(s)
- Maximilian Thees
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Min-Han Lee
- Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, CA 92093, USA
| | - Rosa Luca Bouwmeester
- Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, Netherlands
| | - Pedro H. Rezende-Gonçalves
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
- Departamento de Física, Universidade Federal de Minas Gerais, Av. Pres. Antonio Carlos, 6627 Belo Horizonte, Brazil
| | - Emma David
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Alexandre Zimmers
- LPEM, ESPCI Paris, PSL Research University, CNRS, Sorbonne Université, 75005 Paris, France
| | - Franck Fortuna
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Emmanouil Frantzeskakis
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Nicolas M. Vargas
- Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, CA 92093, USA
| | - Yoav Kalcheim
- Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, CA 92093, USA
| | - Patrick Le Fèvre
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP48, 91192 Gif-sur-Yvette, France
| | - Koji Horiba
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - Hiroshi Kumigashira
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Silke Biermann
- CPHT, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau, France
- Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France
- Department of Physics, Division of Mathematical Physics, Lund University, Professorsgatan 1, 22363 Lund, Sweden
| | - Juan Trastoy
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - Marcelo J. Rozenberg
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
| | - Ivan K. Schuller
- Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, CA 92093, USA
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4
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Abstract
Pressure is an important thermodynamic parameter, allowing the increase of matter density by reducing interatomic distances that result in a change of interatomic interactions. In this context, the long range in which pressure can be changed (over six orders of magnitude with respect to room pressure) may induce structural changes at a much larger extent than those found by changing temperature or chemical composition. In this article, we review the pressure-induced phase transitions of most sesquioxides, i.e., A2O3 compounds. Sesquioxides constitute a big subfamily of ABO3 compounds, due to their large diversity of chemical compositions. They are very important for Earth and Materials Sciences, thanks to their presence in our planet’s crust and mantle, and their wide variety of technological applications. Recent discoveries, hot spots, controversial questions, and future directions of research are highlighted.
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5
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Lechermann F, Bernstein N, Mazin II, Valentí R. Uncovering the Mechanism of the Impurity-Selective Mott Transition in Paramagnetic V_{2}O_{3}. PHYSICAL REVIEW LETTERS 2018; 121:106401. [PMID: 30240239 DOI: 10.1103/physrevlett.121.106401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Indexed: 06/08/2023]
Abstract
While the phase diagrams of the one- and multiorbital Hubbard model have been well studied, the physics of real Mott insulators is often much richer, material dependent, and poorly understood. In the prototype Mott insulator V_{2}O_{3}, chemical pressure was initially believed to explain why the paramagnetic-metal to antiferromagnetic-insulator transition temperature is lowered by Ti doping while Cr doping strengthens correlations, eventually rendering the high-temperature phase paramagnetic insulating. However, this scenario has been recently shown both experimentally and theoretically to be untenable. Based on full structural optimization, we demonstrate via the charge self-consistent combination of density functional theory and dynamical mean-field theory that changes in the V_{2}O_{3} phase diagram are driven by defect-induced local symmetry breakings resulting from dramatically different couplings of Cr and Ti dopants to the host system. This finding emphasizes the high sensitivity of the Mott metal-insulator transition to the local environment and the importance of accurately accounting for the one-electron Hamiltonian, since correlations crucially respond to it.
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Affiliation(s)
- Frank Lechermann
- I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany
| | - Noam Bernstein
- Code 6393, Naval Research Laboratory, Washington, DC 20375, USA
| | - I I Mazin
- Code 6393, Naval Research Laboratory, Washington, DC 20375, USA
| | - Roser Valentí
- Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
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6
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Bar T, Choudhary SK, Ashraf MA, Sujith KS, Puri S, Raj S, Bansal B. Kinetic Spinodal Instabilities in the Mott Transition in V_{2}O_{3}: Evidence from Hysteresis Scaling and Dissipative Phase Ordering. PHYSICAL REVIEW LETTERS 2018; 121:045701. [PMID: 30095963 DOI: 10.1103/physrevlett.121.045701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 03/08/2018] [Indexed: 06/08/2023]
Abstract
We present the first systematic observation of scaling of thermal hysteresis with the temperature scanning rate around an abrupt thermodynamic transition in correlated electron systems. We show that the depth of supercooling and superheating in vanadium sesquioxide (V_{2}O_{3}) shifts with the temperature quench rates. The dynamic scaling exponent is close to the mean field prediction of 2/3. These observations, combined with the purely dissipative continuous ordering seen in "quench-and-hold" experiments, indicate departures from classical nucleation theory toward a barrier-free phase ordering associated with critical dynamics. Observation of critical-like features and scaling in a thermally induced abrupt phase transition suggests that the presence of a spinodal-like instability is not just an artifact of the mean field theories but can also exist in the transformation kinetics of real systems, surviving fluctuations.
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Affiliation(s)
- Tapas Bar
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - Sujeet Kumar Choudhary
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - Md Arsalan Ashraf
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - K S Sujith
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - Sanjay Puri
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Satyabrata Raj
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - Bhavtosh Bansal
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
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7
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Ultrafast evolution and transient phases of a prototype out-of-equilibrium Mott-Hubbard material. Nat Commun 2017; 8:13917. [PMID: 28067228 PMCID: PMC5228036 DOI: 10.1038/ncomms13917] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 11/10/2016] [Indexed: 11/30/2022] Open
Abstract
The study of photoexcited strongly correlated materials is attracting growing interest since their rich phase diagram often translates into an equally rich out-of-equilibrium behaviour. With femtosecond optical pulses, electronic and lattice degrees of freedom can be transiently decoupled, giving the opportunity of stabilizing new states inaccessible by quasi-adiabatic pathways. Here we show that the prototype Mott–Hubbard material V2O3 presents a transient non-thermal phase developing immediately after ultrafast photoexcitation and lasting few picoseconds. For both the insulating and the metallic phase, the formation of the transient configuration is triggered by the excitation of electrons into the bonding a1g orbital, and is then stabilized by a lattice distortion characterized by a hardening of the A1g coherent phonon, in stark contrast with the softening observed upon heating. Our results show the importance of selective electron–lattice interplay for the ultrafast control of material parameters, and are relevant for the optical manipulation of strongly correlated systems. Ultrafast photoexcitation stabilizes new states of matter with rich out-of-equilibrium behaviours. Here, Lantz et al. report a transient non-thermal phase developing immediately after photoexcitation in V2O3, shedding a light on optical manipulation of strongly correlated systems.
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8
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Lo Vecchio I, Denlinger JD, Krupin O, Kim BJ, Metcalf PA, Lupi S, Allen JW, Lanzara A. Fermi Surface of Metallic V_{2}O_{3} from Angle-Resolved Photoemission: Mid-level Filling of e_{g}^{π} Bands. PHYSICAL REVIEW LETTERS 2016; 117:166401. [PMID: 27792364 DOI: 10.1103/physrevlett.117.166401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Indexed: 06/06/2023]
Abstract
Using angle resolved photoemission spectroscopy, we report the first band dispersions and distinct features of the bulk Fermi surface (FS) in the paramagnetic metallic phase of the prototypical metal-insulator transition material V_{2}O_{3}. Along the c axis we observe both an electron pocket and a triangular holelike FS topology, showing that both V 3d a_{1g} and e_{g}^{π} states contribute to the FS. These results challenge the existing correlation-enhanced crystal field splitting theoretical explanation for the transition mechanism and pave the way for the solution of this mystery.
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Affiliation(s)
- I Lo Vecchio
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J D Denlinger
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - O Krupin
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - B J Kim
- Max-Planck-Institut fur Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - P A Metcalf
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - S Lupi
- CNR-IOM and Dipartimento di Fisica, Università di Roma "Sapienza", I-00185 Rome, Italy
| | - J W Allen
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A Lanzara
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
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9
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Deng X, Sternbach A, Haule K, Basov DN, Kotliar G. Shining light on transition-metal oxides: unveiling the hidden Fermi liquid. PHYSICAL REVIEW LETTERS 2014; 113:246404. [PMID: 25541785 DOI: 10.1103/physrevlett.113.246404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 06/04/2023]
Abstract
We use low energy optical spectroscopy and first principles local density approximation plus dynamical mean field theory calculations to test the hypothesis that the anomalous transport properties of strongly correlated metals originate in the strong temperature dependence of their underlying resilient quasiparticles. We express the resistivity in terms of an effective plasma frequency ω(p)* and an effective scattering rate 1/τ(tr)*. We show that in the archetypal correlated material V₂O₃, ω(p)* increases with increasing temperature, while the plasma frequency from the partial sum rule exhibits the opposite trend. 1/τ(tr)* has a more pronounced temperature dependence than the scattering rate obtained from the extended Drude analysis. The theoretical calculations of these quantities are in quantitative agreement with experiment. We conjecture that these are robust properties of all strongly correlated metals, and test the conjecture by carrying out a similar analysis on thin film NdNiO₃ on a LaAlO₃ substrate.
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Affiliation(s)
- Xiaoyu Deng
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - Aaron Sternbach
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - Kristjan Haule
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - D N Basov
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - Gabriel Kotliar
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
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10
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Bahlawane N, Lenoble D. Vanadium Oxide Compounds:Structure, Properties, and Growth from the Gas Phase. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/cvde.201400057] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Naoufal Bahlawane
- Nanomaterials Research Unit, SAM Department; Centre de Recherche Public - Gabriel Lippmann; 41, rue du Brill 4422 Belvaux (Luxembourg)
| | - Damien Lenoble
- Nanomaterials Research Unit, SAM Department; Centre de Recherche Public - Gabriel Lippmann; 41, rue du Brill 4422 Belvaux (Luxembourg)
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11
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Dynamical mean field theory-based electronic structure calculations for correlated materials. Top Curr Chem (Cham) 2014; 347:303-45. [PMID: 24842620 DOI: 10.1007/128_2014_530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
We give an introduction to dynamical mean field approaches to correlated materials. Starting from the concept of electronic correlation, we explain why a theoretical description of correlations in spectroscopic properties needs to go beyond the single-particle picture of band theory.We discuss the main ideas of dynamical mean field theory and its use within realistic electronic structure calculations, illustrated by examples of transition metals, transition metal oxides, and rare-earth compounds. Finally, we summarise recent progress on the calculation of effective Hubbard interactions and the description of dynamical screening effects in solids.
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12
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Guo Y, Clark SJ, Robertson J. Calculation of metallic and insulating phases of V2O3 by hybrid density functionals. J Chem Phys 2014; 140:054702. [DOI: 10.1063/1.4863325] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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13
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Ding Y, Chen CC, Zeng Q, Kim HS, Han MJ, Balasubramanian M, Gordon R, Li F, Bai L, Popov D, Heald SM, Gog T, Mao HK, van Veenendaal M. Novel high-pressure monoclinic metallic phase of V2O3. PHYSICAL REVIEW LETTERS 2014; 112:056401. [PMID: 24580615 DOI: 10.1103/physrevlett.112.056401] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 06/03/2023]
Abstract
Vanadium sesquioxide, V2O3, is a prototypical metal-to-insulator system where, in temperature-dependent studies, the transition always coincides with a corundum-to-monoclinic structural transition. As a function of pressure, V2O3 follows the expected behavior of increased metallicity due to a larger bandwidth for pressures up to 12.5 GPa. Surprisingly, for higher pressures when the structure becomes unstable, the resistance starts to increase. Around 32.5 GPa at 300 K, we observe a novel pressure-induced corundum-to-monoclinic transition between two metallic phases, showing that the structural phase transition can be decoupled from the metal-insulator transition. Using x-ray Raman scattering, we find that screening effects, which are strong in the corundum phase, become weakened at high pressures. Theoretical calculations indicate that this can be related to a decrease in coherent quasiparticle strength, suggesting that the high-pressure phase is likely a critical correlated metal, on the verge of Mott-insulating behavior.
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Affiliation(s)
- Yang Ding
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Cheng-Chien Chen
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Qiaoshi Zeng
- Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA
| | - Heung-Sik Kim
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Myung Joon Han
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | | | | | - Fangfei Li
- HPSynC, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China
| | - Ligang Bai
- HiPSEC and Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada, 89154, USA
| | - Dimitry Popov
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Steve M Heald
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Thomas Gog
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Ho-kwang Mao
- HPSynC, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA and Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, China
| | - Michel van Veenendaal
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA and Department of Physics, Northern Illinois University, De Kalb, Illinois 60115, USA
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14
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Ovsyannikov SV, Trots DM, Kurnosov AV, Morgenroth W, Liermann HP, Dubrovinsky L. Anomalous compression and new high-pressure phases of vanadium sesquioxide, V2O3. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:385401. [PMID: 23988740 DOI: 10.1088/0953-8984/25/38/385401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report results of a powder x-ray diffraction (XRD) study of vanadium sesquioxide, V2O3, under pressurization in a neon pressure-transmitting medium up to 57 GPa. We have established a bulk modulus value for corundum-type V2O3 of B0 = 150 GPa at B' = 4. This bulk modulus value is the lowest among those known for the corundum-type-structured oxides, e.g. Al2O3, α-Fe2O3, Cr2O3, Ti2O3, and α-Ga2O3. We have proposed that this might be related to the difference in the electronic band structures: at room temperature V2O3 is metallic, but the above corundum-structured sesquioxides are semiconducting or insulating. Around ∼21-27 and ∼50 GPa we registered changes in the XRD patterns that might be addressed to phase transitions. These transitions were sluggish upon room-temperature compression, and hence we additionally facilitated them by the laser heating of one sample. We have refined the XRD patterns of only the first high-pressure phase in an orthorhombic lattice of a Rh2O3(II)-type. Our findings significantly extend the knowledge of the P-T phase diagram of V2O3 and advance the understanding of its properties. We speculate that the elastic properties of V2O3 can be closely linked to its electronic band structure and, consequently, we propose that slightly doped V2O3 (e.g. with Cr) could be a potential candidate for systems in which the bulk modulus value may be remarkably switched by moderate pressure or temperature.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, Bayreuth D-95447, Germany.
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15
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Ji Y, Zhang Y, Gao M, Yuan Z, Jin C, Lin Y. Growth and physical properties of vanadium oxide thin films with controllable phases. ACTA ACUST UNITED AC 2013. [DOI: 10.1557/opl.2013.507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTVanadium oxides thin films with variable oxidation states have attracted great attention due to their unique electrical, optical properties and many important applications in microelectronics, infrared optical devices, and energy harvest systems. However, to fabricate vanadium oxide thin films with controllable phases and desired transport properties is still a challenge by using a chemical solution deposition (CSD) technique. In this paper, we report that vanadium oxide thin films with well controlled phases such as rhombohedral V2O3 and monoclinic VO2 could be synthesized on Al2O3 (0001) substrates using a CSD technique ---- polymer assisted deposition (PAD). Both V2O3 and VO2 thin films can be well controlled with good epitaxial quality by optimizing the fabrication parameters. The electrical resistivity changes 3∼4 orders of magnitude at metal insulator transition for both epitaxial V2O3 and VO2 thin films. The correlation between the physical properties and the microstructures of the films will be discussed.
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Llorens I, Lahera E, Delnet W, Proux O, Braillard A, Hazemann JL, Prat A, Testemale D, Dermigny Q, Gelebart F, Morand M, Shukla A, Bardou N, Ulrich O, Arnaud S, Berar JF, Boudet N, Caillot B, Chaurand P, Rose J, Doelsch E, Martin P, Solari PL. High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:063104. [PMID: 22755612 DOI: 10.1063/1.4728414] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Fluorescence detection is classically achieved with a solid state detector (SSD) on x-ray absorption spectroscopy (XAS) beamlines. This kind of detection however presents some limitations related to the limited energy resolution and saturation. Crystal analyzer spectrometers (CAS) based on a Johann-type geometry have been developed to overcome these limitations. We have tested and installed such a system on the BM30B/CRG-FAME XAS beamline at the ESRF dedicated to the structural investigation of very dilute systems in environmental, material and biological sciences. The spectrometer has been designed to be a mobile device for easy integration in multi-purpose hard x-ray synchrotron beamlines or even with a laboratory x-ray source. The CAS allows to collect x-ray photons from a large solid angle with five spherically bent crystals. It will cover a large energy range allowing to probe fluorescence lines characteristic of all the elements from Ca (Z = 20) to U (Z = 92). It provides an energy resolution of 1-2 eV. XAS spectroscopy is the main application of this device even if other spectroscopic techniques (RIXS, XES, XRS, etc.) can be also achieved with it. The performances of the CAS are illustrated by two experiments that are difficult or impossible to perform with SSD and the complementarity of the CAS vs SSD detectors is discussed.
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Liu MK, Pardo B, Zhang J, Qazilbash MM, Yun SJ, Fei Z, Shin JH, Kim HT, Basov DN, Averitt RD. Photoinduced phase transitions by time-resolved far-infrared spectroscopy in V2O3. PHYSICAL REVIEW LETTERS 2011; 107:066403. [PMID: 21902347 DOI: 10.1103/physrevlett.107.066403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 05/12/2011] [Indexed: 05/31/2023]
Abstract
Using time-resolved far-infrared spectroscopy, we observe multiple routes for photoinduced phase transitions in V(2)O(3). This includes (i) a photothermal antiferromagnetic to paramagnetic transition and (ii) an incipient strain-generated paramagnetic metal to paramagnetic insulator transition, which manifests as coherent oscillations in the far-infrared conductivity. The ∼100 ps conductivity oscillation results from coherent acoustic phonon modulation of the bandwidth W. Our results indicate that poor metals are particularly amenable to coherent strain control of their electronic properties.
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Affiliation(s)
- M K Liu
- Department of Physics, Boston University, Massachusetts 02215, USA
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Lupi S, Baldassarre L, Mansart B, Perucchi A, Barinov A, Dudin P, Papalazarou E, Rodolakis F, Rueff JP, Itié JP, Ravy S, Nicoletti D, Postorino P, Hansmann P, Parragh N, Toschi A, Saha-Dasgupta T, Andersen OK, Sangiovanni G, Held K, Marsi M. A microscopic view on the Mott transition in chromium-doped V2O3. Nat Commun 2010; 1:105. [DOI: 10.1038/ncomms1109] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Accepted: 10/07/2010] [Indexed: 11/09/2022] Open
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Wang H, Schwingenschlögl U. The importance of the on-site electron-electron interaction for the magnetic coupling in the zigzag spin-chain compound In2VO5. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:416002. [PMID: 21386604 DOI: 10.1088/0953-8984/22/41/416002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present first-principles electronic structure calculations for the zigzag spin-chain compound In(2)VO(5) using the generalized gradient approximation both with and without inclusion of an on-site Coulomb interaction. It has been proposed that In(2)VO(5) is characterized by itinerant V 3d electrons at high temperature and localized electrons at low temperature. Consequently, it is to be expected that electronic correlations play an important role for the magnetic transition from ferromagnetic to antiferromagnetic exchange around 120 K. In this context, we study the electronic and magnetic properties of a set of possible spin configurations. Our calculations show that inclusion of an on-site Coulomb interaction in fact changes the ground state from ferromagnetic to antiferromagnetic.
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Affiliation(s)
- H Wang
- KAUST, PSE Division, 23955-6900 Thuwal, Kingdom of Saudi Arabia
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