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Murray PD, Gilbert DA, Grutter AJ, Kirby BJ, Hernández-Maldonado D, Varela M, Brubaker ZE, Liyanage WLNC, Chopdekar RV, Taufour V, Zieve RJ, Jeffries JR, Arenholz E, Takamura Y, Borchers JA, Liu K. Interfacial-Redox-Induced Tuning of Superconductivity in YBa 2Cu 3O 7-δ. ACS APPLIED MATERIALS & INTERFACES 2020; 12:4741-4748. [PMID: 31880904 DOI: 10.1021/acsami.9b18820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Solid-state ionic approaches for modifying ion distributions in getter/oxide heterostructures offer exciting potentials to control material properties. Here, we report a simple, scalable approach allowing for manipulation of the superconducting transition in optimally doped YBa2Cu3O7-δ (YBCO) films via a chemically driven ionic migration mechanism. Using a thin Gd capping layer of up to 20 nm deposited onto 100 nm thick epitaxial YBCO films, oxygen is found to leach from deep within the YBCO. Progressive reduction of the superconducting transition is observed, with complete suppression possible for a sufficiently thick Gd layer. These effects arise from the combined impact of redox-driven electron doping and modification of the YBCO microstructure due to oxygen migration and depletion. This work demonstrates an effective step toward total ionic tuning of superconductivity in oxides, an interface-induced effect that goes well into the quasi-bulk regime, opening-up possibilities for electric field manipulation.
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Affiliation(s)
| | - Dustin A Gilbert
- NIST Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
- Department of Materials Science and Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Alexander J Grutter
- NIST Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
| | - Brian J Kirby
- NIST Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
| | - David Hernández-Maldonado
- Dept. de Física de Materiales & Instituto Pluridisciplinar , Universidad Complutense de Madrid , Madrid 28040 , Spain
| | - Maria Varela
- Dept. de Física de Materiales & Instituto Pluridisciplinar , Universidad Complutense de Madrid , Madrid 28040 , Spain
| | - Zachary E Brubaker
- ∇Materials Science Division and ○Physics Division , Lawrence Livermore National Laboratory , Livermore , California 94550 , United States
| | - W L N C Liyanage
- Department of Materials Science and Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Rajesh V Chopdekar
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | | | | | | | - Elke Arenholz
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | | | - Julie A Borchers
- NIST Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
| | - Kai Liu
- Physics Department , Georgetown University , Washington, D.C. 20057 , United States
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Abstract
▪ Abstract We discuss high-dielectric films, in general, oxide ferroelectrics based on simple perovskite structures and related Aurivillius-phase layered structure perovskites employed as thin-film capacitors in dynamic random access memories (DRAMs). Emphasis is on breakdown mechanisms and limits, leakage currents, electrodes and electrode interfaces, scaling to submicron geometries, and deposition techniques.
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Affiliation(s)
- J. F. Scott
- Max-Planck Institute for Microstructural Physics, Halle, Saale D-06120, Germany
- School of Physics, University of New South Wales, Sydney NSW, 2052, Australia
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Hawley M, Raistrick ID, Beery JG, Houlton RJ. Growth Mechanism of Sputtered Films of YBa
2
Cu
3
O
7
Studied by Scanning Tunneling Microscopy. Science 1991; 251:1587-9. [PMID: 17793141 DOI: 10.1126/science.251.5001.1587] [Citation(s) in RCA: 406] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The surface microstructures of c-axis-oriented films of YBa(2)Cu(3)O(7), deposited by off-axis magnetron sputtering on MgO and SrTiO(3) single crystal (100) substrates, have been investigated with scanning tunneling microscopy and atomic force microscopy. There is strong evidence that the films nucleate as islands and grow by adding material to the edge of a spirally rising step. This results in columnar grains, each of which contains a screw dislocation at its center. This microstructure may be of significance in determining superconducting properties such as critical current, and represents a significant difference between thin films (especially those grown in situ) and bulk materials.
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Vadlamannati S, England P, Stoffel NG, Findikoglu A, Li Q, Venkatesan T, McLean WL. 200-keV He+-ion irradiation effects on the properties of pulsed-laser-deposited YBa2Cu3O7-x thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:5290-5295. [PMID: 9997923 DOI: 10.1103/physrevb.43.5290] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ravi TS, Hwang DM, Ramesh R, Chan SW, Nazar L, Chen CY, Inam A, Venkatesan T. Grain boundaries and interfaces in Y-Ba-Cu-O films laser deposited on single-crystal MgO. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10141-10151. [PMID: 9995270 DOI: 10.1103/physrevb.42.10141] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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