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Orgiani P, Chaluvadi SK, Chalil SP, Mazzola F, Jana A, Dolabella S, Rajak P, Ferrara M, Benedetti D, Fondacaro A, Salvador F, Ciancio R, Fujii J, Panaccione G, Vobornik I, Rossi G. Dual pulsed laser deposition system for the growth of complex materials and heterostructures. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:033903. [PMID: 37012774 DOI: 10.1063/5.0138889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/12/2023] [Indexed: 06/19/2023]
Abstract
Here, we present an integrated ultra-high-vacuum (UHV) apparatus for the growth of complex materials and heterostructures. The specific growth technique is the Pulsed Laser Deposition (PLD) by means of a dual-laser source based on an excimer KrF ultraviolet and solid-state Nd:YAG infra-red lasers. By taking advantage of the two laser sources-both lasers can be independently used within the deposition chambers-a large number of different materials-ranging from oxides to metals, to selenides, and others-can be successfully grown in the form of thin films and heterostructures. All of the samples can be in situ transferred between the deposition chambers and the analysis chambers by using vessels and holders' manipulators. The apparatus also offers the possibility to transfer samples to remote instrumentation under UHV conditions by means of commercially available UHV-suitcases. The dual-PLD operates for in-house research as well as user facility in combination with the Advanced Photo-electric Effect beamline at the Elettra synchrotron radiation facility in Trieste and allows synchrotron-based photo-emission as well as x-ray absorption experiments on pristine films and heterostructures.
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Affiliation(s)
- P Orgiani
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - S K Chaluvadi
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - S Punathum Chalil
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - F Mazzola
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, 30172 Venice, Italy
| | - A Jana
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - S Dolabella
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - P Rajak
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - M Ferrara
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - D Benedetti
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - A Fondacaro
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - F Salvador
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - R Ciancio
- AREA Science Park, Padriciano 99, I-34149 Trieste, Italy
| | - J Fujii
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - G Panaccione
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - I Vobornik
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
| | - G Rossi
- CNR-IOM Istituto Officina dei Materiali, TASC Laboratory, Area Science Park, S.S. 14, km 163.5, I-34149 Trieste, Italy
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Orgiani P, Galdi A, Schlom DG, Maritato L. Normal-State Transport Properties of Infinite-Layer Sr 1-xLa xCuO 2 Electron-Doped Cuprates in Optimal- and Over-Doped Regimes. NANOMATERIALS 2022; 12:nano12101709. [PMID: 35630928 PMCID: PMC9146696 DOI: 10.3390/nano12101709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/08/2022] [Accepted: 05/13/2022] [Indexed: 12/03/2022]
Abstract
Transport properties of electron-doped cuprate Sr1−xLaxCuO2 thin films have been investigated as a function of doping. In particular, optimal- and over-doped samples were obtained by tuning the Sr:La stoichiometric ratio. Optimal-doped samples show a non-Fermi liquid behavior characterized by linear dependence of the resistivity from room temperature down to intermediate temperature (about 150–170 K). However, by approaching temperatures in the superconducting transition, a Fermi-liquid behavior-characterized by a T2-scaling law-was observed. Once established, the transition from a linear-T to a quadratic-T2 behavior was successfully traced back in over-doped samples, even occurring at lower temperatures. In addition, the over-doped samples show a crossover to a linear-T to a logarithmic dependence at high temperatures compatible with anti-ferromagnetic spin fluctuations dominating the normal state properties of electron-doped cuprates.
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Affiliation(s)
- Pasquale Orgiani
- CNR-IOM, TASC Laboratory in Area Science Park, 34139 Trieste, Italy
- Correspondence:
| | - Alice Galdi
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, 84084 Fisciano, Italy; (A.G.); (L.M.)
| | - Darrell G. Schlom
- Department of Material Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY 14853, USA;
| | - Luigi Maritato
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, 84084 Fisciano, Italy; (A.G.); (L.M.)
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Oliveira FS, Cipriano RB, da Silva FT, Romão EC, Dos Santos CAM. Simple analytical method for determining electrical resistivity and sheet resistance using the van der Pauw procedure. Sci Rep 2020; 10:16379. [PMID: 33009433 PMCID: PMC7532437 DOI: 10.1038/s41598-020-72097-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 08/24/2020] [Indexed: 11/11/2022] Open
Abstract
This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The method is compared with previous numerical solutions and available experimental data showing a universal behavior for isotropic conductors. An approximated solution is also reported allowing one to easily determine ρ and RS for samples either with regular or arbitrary shapes.
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Affiliation(s)
- F S Oliveira
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - R B Cipriano
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - F T da Silva
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - E C Romão
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil
| | - C A M Dos Santos
- Escola de Engenharia de Lorena, University of São Paulo, 12.602-810, Lorena, SP, Brazil.
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Si L, Xiao W, Kaufmann J, Tomczak JM, Lu Y, Zhong Z, Held K. Topotactic Hydrogen in Nickelate Superconductors and Akin Infinite-Layer Oxides ABO_{2}. PHYSICAL REVIEW LETTERS 2020; 124:166402. [PMID: 32383925 DOI: 10.1103/physrevlett.124.166402] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Superconducting nickelates appear to be difficult to synthesize. Since the chemical reduction of ABO_{3} [rare earth (A), transition metal (B)] with CaH_{2} may result in both ABO_{2} and ABO_{2}H, we calculate the topotactic H binding energy by density functional theory (DFT). We find intercalating H to be energetically favorable for LaNiO_{2} but not for Sr-doped NdNiO_{2}. This has dramatic consequences for the electronic structure as determined by DFT+dynamical mean field theory: that of 3d^{9} LaNiO_{2} is similar to (doped) cuprates, 3d^{8} LaNiO_{2}H is a two-orbital Mott insulator. Topotactic H might hence explain why some nickelates are superconducting and others are not.
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Affiliation(s)
- Liang Si
- Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China
- Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria
| | - Wen Xiao
- Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China
| | - Josef Kaufmann
- Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria
| | - Jan M Tomczak
- Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria
| | - Yi Lu
- Institute for Theoretical Physics, Heidelberg University, Philosophenweg 19, 69120 Heidelberg, Germany
| | - Zhicheng Zhong
- Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China
- China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Karsten Held
- Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria
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Leng X, Garcia-Barriocanal J, Bose S, Lee Y, Goldman AM. Electrostatic control of the evolution from a superconducting phase to an insulating phase in ultrathin YBa₂Cu₃O(7-x) films. PHYSICAL REVIEW LETTERS 2011; 107:027001. [PMID: 21797633 DOI: 10.1103/physrevlett.107.027001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Indexed: 05/31/2023]
Abstract
The electrical transport properties of ultrathin YBa₂Cu₃O(7-x) films have been modified using an electric double layer transistor configuration employing an ionic liquid. A clear evolution from superconductor to insulator was observed in nominally 7 unit-cell-thick films. Using a finite size scaling analysis, curves of resistance versus temperature, R(T), over the temperature range from 6 to 22 K were found to collapse onto a single scaling function, which suggests the presence of a quantum critical point. However, the scaling fails at the lowest temperatures indicating the possible presence of an additional phase between the superconducting and insulating regimes.
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Affiliation(s)
- Xiang Leng
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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