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Nelson JN, Schreiber NJ, Georgescu AB, Goodge BH, Faeth BD, Parzyck CT, Zeledon C, Kourkoutis LF, Millis AJ, Georges A, Schlom DG, Shen KM. Interfacial charge transfer and persistent metallicity of ultrathin SrIrO 3/SrRuO 3 heterostructures. Sci Adv 2022; 8:eabj0481. [PMID: 35119924 PMCID: PMC8816341 DOI: 10.1126/sciadv.abj0481] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 12/13/2021] [Indexed: 05/28/2023]
Abstract
Interface quantum materials have yielded a plethora of previously unknown phenomena, including unconventional superconductivity, topological phases, and possible Majorana fermions. Typically, such states are detected at the interface between two insulating constituents by electrical transport, but whether either material is conducting, transport techniques become insensitive to interfacial properties. To overcome these limitations, we use angle-resolved photoemission spectroscopy and molecular beam epitaxy to reveal the electronic structure, charge transfer, doping profile, and carrier effective masses in a layer-by-layer fashion for the interface between the Dirac nodal-line semimetal SrIrO3 and the correlated metallic Weyl ferromagnet SrRuO3. We find that electrons are transferred from the SrIrO3 to SrRuO3, with an estimated screening length of λ = 3.2 ± 0.1 Å. In addition, we find that metallicity is preserved even down to a single SrIrO3 layer, where the dimensionality-driven metal-insulator transition typically observed in SrIrO3 is avoided because of strong hybridization of the Ir and Ru t2g states.
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Affiliation(s)
- Jocienne N. Nelson
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
| | - Nathaniel J. Schreiber
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Alexandru B. Georgescu
- Center for Computational Quantum Physics, Flatiron Institute, New York, NY 10010, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Berit H. Goodge
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA
| | - Brendan D. Faeth
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
| | - Christopher T. Parzyck
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
| | - Cyrus Zeledon
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Lena F. Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY 14853, USA
| | - Andrew J. Millis
- Center for Computational Quantum Physics, Flatiron Institute, New York, NY 10010, USA
- Department of Physics, Columbia University, New York, NY 10027, USA
| | - Antoine Georges
- Center for Computational Quantum Physics, Flatiron Institute, New York, NY 10010, USA
- Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France
- CPHT, CNRS, Ecole Polytechnique, IP Paris, F-91128 Palaiseau, France
- DQMP, Universitè de Genéve, 24 quai Ernest Ansermet, CH-1211 Genéve, Suisse
| | - Darrell G. Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY 14853, USA
- Leibniz-Institut für Kristallzüchtung, Max-Born-Str. 2, 12489 Berlin, Germany
| | - Kyle M. Shen
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY 14853, USA
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2
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Faeth BD, Xie S, Yang S, Kawasaki JK, Nelson JN, Zhang S, Parzyck C, Mishra P, Li C, Jozwiak C, Bostwick A, Rotenberg E, Schlom DG, Shen KM. Interfacial Electron-Phonon Coupling Constants Extracted from Intrinsic Replica Bands in Monolayer FeSe/SrTiO_{3}. Phys Rev Lett 2021; 127:016803. [PMID: 34270322 DOI: 10.1103/physrevlett.127.016803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/26/2021] [Accepted: 05/19/2021] [Indexed: 06/13/2023]
Abstract
The observation of replica bands by angle-resolved photoemission spectroscopy has ignited interest in the study of electron-phonon coupling at low carrier densities, particularly in monolayer FeSe/SrTiO_{3}, where the appearance of replica bands has motivated theoretical work suggesting that the interfacial coupling of electrons in the FeSe layer to optical phonons in the SrTiO_{3} substrate might contribute to the enhanced superconducting pairing temperature. Alternatively, it has also been recently proposed that such replica bands might instead originate from extrinsic final state losses associated with the photoemission process. Here, we perform a quantitative examination of replica bands in monolayer FeSe/SrTiO_{3}, where we are able to conclusively demonstrate that the replica bands are indeed signatures of intrinsic electron-boson coupling, and not associated with final state effects. A detailed analysis of the energy splittings and relative peak intensities between the higher-order replicas, as well as other self-energy effects, allows us to determine that the interfacial electron-phonon coupling in the system corresponds to a value of λ=0.19±0.02, providing valuable insights into the enhancement of superconductivity in monolayer FeSe/SrTiO_{3}. The methodology employed here can also serve as a new and general approach for making more rigorous and quantitative comparisons to theoretical calculations of electron-phonon interactions and coupling constants.
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Affiliation(s)
- Brendan D Faeth
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Saien Xie
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Shuolong Yang
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Jason K Kawasaki
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
| | - Jocienne N Nelson
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Shuyuan Zhang
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Christopher Parzyck
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Pramita Mishra
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Chen Li
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Christopher Jozwiak
- Advanced Light Source, E.O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Aaron Bostwick
- Advanced Light Source, E.O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Eli Rotenberg
- Advanced Light Source, E.O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Darrell G Schlom
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Kyle M Shen
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
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Ruf JP, Paik H, Schreiber NJ, Nair HP, Miao L, Kawasaki JK, Nelson JN, Faeth BD, Lee Y, Goodge BH, Pamuk B, Fennie CJ, Kourkoutis LF, Schlom DG, Shen KM. Strain-stabilized superconductivity. Nat Commun 2021; 12:59. [PMID: 33397949 PMCID: PMC7782483 DOI: 10.1038/s41467-020-20252-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/19/2020] [Indexed: 11/09/2022] Open
Abstract
Superconductivity is among the most fascinating and well-studied quantum states of matter. Despite over 100 years of research, a detailed understanding of how features of the normal-state electronic structure determine superconducting properties has remained elusive. For instance, the ability to deterministically enhance the superconducting transition temperature by design, rather than by serendipity, has been a long sought-after goal in condensed matter physics and materials science, but achieving this objective may require new tools, techniques and approaches. Here, we report the transmutation of a normal metal into a superconductor through the application of epitaxial strain. We demonstrate that synthesizing RuO2 thin films on (110)-oriented TiO2 substrates enhances the density of states near the Fermi level, which stabilizes superconductivity under strain, and suggests that a promising strategy to create new transition-metal superconductors is to apply judiciously chosen anisotropic strains that redistribute carriers within the low-energy manifold of d orbitals.
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Affiliation(s)
- J P Ruf
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA.
| | - H Paik
- Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials, Cornell University, Ithaca, NY, 14853, USA.,Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - N J Schreiber
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - H P Nair
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - L Miao
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA
| | - J K Kawasaki
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA.,Department of Materials Science and Engineering, University of Wisconsin, Madison, WI, 53706, USA
| | - J N Nelson
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA
| | - B D Faeth
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA.,Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials, Cornell University, Ithaca, NY, 14853, USA
| | - Y Lee
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA
| | - B H Goodge
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA.,Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY, 14853, USA
| | - B Pamuk
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA
| | - C J Fennie
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA
| | - L F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA.,Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY, 14853, USA
| | - D G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA.,Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY, 14853, USA.,Leibniz-Institut für Kristallzüchtung, Max-Born-Str. 2, Berlin, 12489, Germany
| | - K M Shen
- Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY, 14853, USA. .,Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY, 14853, USA.
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4
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Wan G, Freeland JW, Kloppenburg J, Petretto G, Nelson JN, Kuo DY, Sun CJ, Wen J, Diulus JT, Herman GS, Dong Y, Kou R, Sun J, Chen S, Shen KM, Schlom DG, Rignanese GM, Hautier G, Fong DD, Feng Z, Zhou H, Suntivich J. Amorphization mechanism of SrIrO 3 electrocatalyst: How oxygen redox initiates ionic diffusion and structural reorganization. Sci Adv 2021; 7:eabc7323. [PMID: 33523986 PMCID: PMC7793586 DOI: 10.1126/sciadv.abc7323] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 11/18/2020] [Indexed: 05/19/2023]
Abstract
The use of renewable electricity to prepare materials and fuels from abundant molecules offers a tantalizing opportunity to address concerns over energy and materials sustainability. The oxygen evolution reaction (OER) is integral to nearly all material and fuel electrosyntheses. However, very little is known about the structural evolution of the OER electrocatalyst, especially the amorphous layer that forms from the crystalline structure. Here, we investigate the interfacial transformation of the SrIrO3 OER electrocatalyst. The SrIrO3 amorphization is initiated by the lattice oxygen redox, a step that allows Sr2+ to diffuse and O2- to reorganize the SrIrO3 structure. This activation turns SrIrO3 into a highly disordered Ir octahedral network with Ir square-planar motif. The final Sr y IrO x exhibits a greater degree of disorder than IrO x made from other processing methods. Our results demonstrate that the structural reorganization facilitated by coupled ionic diffusions is essential to the disordered structure of the SrIrO3 electrocatalyst.
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Affiliation(s)
- Gang Wan
- Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
| | - John W Freeland
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jan Kloppenburg
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Chemin des Étoiles 8, B-1348 Louvain-la-Neuve, Belgium
| | - Guido Petretto
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Chemin des Étoiles 8, B-1348 Louvain-la-Neuve, Belgium
| | - Jocienne N Nelson
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
| | - Ding-Yuan Kuo
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Cheng-Jun Sun
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439, USA
| | - J Trey Diulus
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA
| | - Gregory S Herman
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA
| | - Yongqi Dong
- Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ronghui Kou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jingying Sun
- Department of Physics and the Texas Center for Superconductivity, University of Houston, Houston, TX 77204, USA
| | - Shuo Chen
- Department of Physics and the Texas Center for Superconductivity, University of Houston, Houston, TX 77204, USA
| | - Kyle M Shen
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY 14853, USA
| | - Darrell G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY 14853, USA
- Leibniz-Institut für Kristallzüchtung, Max-Born-Str. 2, 12489 Berlin, Germany
| | - Gian-Marco Rignanese
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Chemin des Étoiles 8, B-1348 Louvain-la-Neuve, Belgium
| | - Geoffroy Hautier
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Chemin des Étoiles 8, B-1348 Louvain-la-Neuve, Belgium
| | - Dillon D Fong
- Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
| | - Zhenxing Feng
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA.
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA.
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY 14853, USA
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5
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Bose A, Nelson JN, Zhang XS, Jadaun P, Jain R, Schlom DG, Ralph DC, Muller DA, Shen KM, Buhrman RA. Effects of Anisotropic Strain on Spin-Orbit Torque Produced by the Dirac Nodal Line Semimetal IrO 2. ACS Appl Mater Interfaces 2020; 12:55411-55416. [PMID: 33232102 DOI: 10.1021/acsami.0c16485] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report spin-torque ferromagnetic resonance studies of the efficiency of the damping-like (ξDL) spin-orbit torque exerted on an adjacent ferromagnet film by current flowing in epitaxial (001) and (110) IrO2 thin films. IrO2 possesses Dirac nodal lines (DNLs) in the band structure that are gapped by spin-orbit coupling, which could enable a very high spin Hall conductivity, σSH. We find that the (001) films do exhibit exceptionally high ξDL ranging from 0.45 at 293 K to 0.65 at 30 K, which sets the lower bounds of σSH to be 1.9 × 105 and 3.75 × 105 Ω-1 m-1, respectively, 10 times higher and of opposite sign than the theoretical prediction. Furthermore, ξDL and σSH are substantially reduced in anisotropically strained (110) films. We suggest that this high sensitivity to anisotropic strain is because of changes in contributions to σSH near the DNLs.
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Affiliation(s)
- Arnab Bose
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Jocienne N Nelson
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Xiyue S Zhang
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Priyamvada Jadaun
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rakshit Jain
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Darrell G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Daniel C Ralph
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - David A Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Kyle M Shen
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Robert A Buhrman
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
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6
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Nelson JN, Parzyck CT, Faeth BD, Kawasaki JK, Schlom DG, Shen KM. Mott gap collapse in lightly hole-doped Sr 2-xK xIrO 4. Nat Commun 2020; 11:2597. [PMID: 32444617 PMCID: PMC7244596 DOI: 10.1038/s41467-020-16425-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 04/23/2020] [Indexed: 11/09/2022] Open
Abstract
The evolution of Sr2IrO4 upon carrier doping has been a subject of intense interest, due to its similarities to the parent cuprates, yet the intrinsic behaviour of Sr2IrO4 upon hole doping remains enigmatic. Here, we synthesize and investigate hole-doped Sr2-xKxIrO4 utilizing a combination of reactive oxide molecular-beam epitaxy, substitutional diffusion and in-situ angle-resolved photoemission spectroscopy. Upon hole doping, we observe the formation of a coherent, two-band Fermi surface, consisting of both hole pockets centred at (π, 0) and electron pockets centred at (π/2, π/2). In particular, the strong similarities between the Fermi surface topology and quasiparticle band structure of hole- and electron-doped Sr2IrO4 are striking given the different internal structure of doped electrons versus holes.
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Affiliation(s)
- J N Nelson
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York, 14853, USA
| | - C T Parzyck
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York, 14853, USA
| | - B D Faeth
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York, 14853, USA
| | - J K Kawasaki
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York, 14853, USA.,Department of Materials Science and Engineering, Cornell University, Ithaca, New York, 14853, USA.,Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York, 14853, USA.,Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin, 53706, USA
| | - D G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York, 14853, USA.,Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York, 14853, USA
| | - K M Shen
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York, 14853, USA. .,Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York, 14853, USA.
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7
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Kuo DY, Paik H, Nelson JN, Shen KM, Schlom DG, Suntivich J. Chlorine evolution reaction electrocatalysis on RuO2(110) and IrO2(110) grown using molecular-beam epitaxy. J Chem Phys 2019; 150:041726. [DOI: 10.1063/1.5051429] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ding-Yuan Kuo
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Hanjong Paik
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Jocienne N. Nelson
- Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Kyle M. Shen
- Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
| | - Darrell G. Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
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8
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Kawasaki JK, Kim CH, Nelson JN, Crisp S, Zollner CJ, Biegenwald E, Heron JT, Fennie CJ, Schlom DG, Shen KM. Engineering Carrier Effective Masses in Ultrathin Quantum Wells of IrO_{2}. Phys Rev Lett 2018; 121:176802. [PMID: 30411938 DOI: 10.1103/physrevlett.121.176802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 05/09/2018] [Indexed: 06/08/2023]
Abstract
The carrier effective mass plays a crucial role in modern electronic, optical, and catalytic devices and is fundamentally related to key properties of solids such as the mobility and density of states. Here we demonstrate a method to deterministically engineer the effective mass using spatial confinement in metallic quantum wells of the transition metal oxide IrO_{2}. Using a combination of in situ angle-resolved photoemission spectroscopy measurements in conjunction with precise synthesis by oxide molecular-beam epitaxy, we show that the low-energy electronic subbands in ultrathin films of rutile IrO_{2} have their effective masses enhanced by up to a factor of 6 with respect to the bulk. The origin of this strikingly large mass enhancement is the confinement-induced quantization of the highly nonparabolic, three-dimensional electronic structure of IrO_{2} in the ultrathin limit. This mechanism lies in contrast to that observed in other transition metal oxides, in which mass enhancement tends to result from complex electron-electron interactions and is difficult to control. Our results demonstrate a general route towards the deterministic enhancement and engineering of carrier effective masses in spatially confined systems, based on an understanding of the three-dimensional bulk electronic structure.
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Affiliation(s)
- Jason K Kawasaki
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
- Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
- Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Choong H Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul, Korea
- Department of Physics and Astronomy, Seoul National University, Seoul, Korea
| | - Jocienne N Nelson
- Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Sophie Crisp
- Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
| | - Christian J Zollner
- Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
| | - Eric Biegenwald
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - John T Heron
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Craig J Fennie
- Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
| | - Darrell G Schlom
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Kyle M Shen
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA
- Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
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9
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Kuo DY, Kawasaki JK, Nelson JN, Kloppenburg J, Hautier G, Shen KM, Schlom DG, Suntivich J. Influence of Surface Adsorption on the Oxygen Evolution Reaction on IrO2(110). J Am Chem Soc 2017; 139:3473-3479. [DOI: 10.1021/jacs.6b11932] [Citation(s) in RCA: 216] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ding-Yuan Kuo
- Department
of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jason K. Kawasaki
- Laboratory
of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Jocienne N. Nelson
- Laboratory
of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Jan Kloppenburg
- Institute
of Condensed Matter and Nanosciences (ICMN), Université catholique de Louvain, Louvain-la-Neuve 1348, Belgium
| | - Geoffroy Hautier
- Institute
of Condensed Matter and Nanosciences (ICMN), Université catholique de Louvain, Louvain-la-Neuve 1348, Belgium
| | - Kyle M. Shen
- Laboratory
of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Darrell G. Schlom
- Department
of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Jin Suntivich
- Department
of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
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10
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Kapelewski MT, Geier SJ, Hudson MR, Stück D, Mason JA, Nelson JN, Xiao DJ, Hulvey Z, Gilmour E, FitzGerald SA, Head-Gordon M, Brown CM, Long JR. M2(m-dobdc) (M = Mg, Mn, Fe, Co, Ni) Metal–Organic Frameworks Exhibiting Increased Charge Density and Enhanced H2 Binding at the Open Metal Sites. J Am Chem Soc 2014; 136:12119-29. [DOI: 10.1021/ja506230r] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Matthew T. Kapelewski
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Stephen J. Geier
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Matthew R. Hudson
- Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - David Stück
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Jarad A. Mason
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Jocienne N. Nelson
- Department
of Physics, Oberlin College, Oberlin, Ohio 44074, United States
| | - Dianne J. Xiao
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Zeric Hulvey
- Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Department
of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Elizabeth Gilmour
- Department
of Physics, Oberlin College, Oberlin, Ohio 44074, United States
| | | | - Martin Head-Gordon
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Craig M. Brown
- Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Chemical
and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Jeffrey R. Long
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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11
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Reist C, Kauffmann CD, Haier RJ, Sangdahl C, DeMet EM, Chicz-DeMet A, Nelson JN. A controlled trial of desipramine in 18 men with posttraumatic stress disorder. Am J Psychiatry 1989; 146:513-6. [PMID: 2648867 DOI: 10.1176/ajp.146.4.513] [Citation(s) in RCA: 122] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Eighteen male U.S. veterans meeting DSM-III criteria for posttraumatic stress disorder (PTSD) completed a 4-week double-blind, crossover study comparing administration of 200 mg/day of desipramine with placebo. Response was measured by using the Beck Depression Inventory, the Hamilton Rating Scale for Depression, the Hamilton Rating Scale for Anxiety, and the Impact of Event Scale. Overall, the only apparent response to desipramine was in some symptoms of depression; there were no changes in anxiety and other PTSD symptoms.
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Affiliation(s)
- C Reist
- Department of Psychiatry, VA Medical Center, Long Beach, CA 90822
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12
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Kauffman CD, Reist C, Djenderedjian A, Nelson JN, Haier RJ. Biological markers of affective disorders and posttraumatic stress disorder: a pilot study with desipramine. J Clin Psychiatry 1987; 48:366-7. [PMID: 3114242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Three biological markers of affective disorders and response to desipramine were used to study the relationship of posttraumatic stress disorder (PTSD) to affective illness. Blunted TRH response and decreased REM latency in eight patients with PTSD occurred at frequencies similar to those that have been found in patients with major affective disorder. Pretreatment Hamilton Rating Scale for Depression and Beck Depression Inventory scale scores were elevated; scores after 4 weeks' treatment with desipramine revealed significant (p less than .05 and p less than .005, respectively) improvement. These findings support a link between PTSD and affective illness.
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