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23 February 2018 Superconductor sandwiches: cuprate-manganite multilayers with a remarkable new ground state
B. P. P. Mallett, P. Marsik, J. Khmaladze, R. Arul, M. Minola, M. C. Simpson, C. Bernhard
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Proceedings Volume 10533, Oxide-based Materials and Devices IX; 105330Y (2018) https://doi.org/10.1117/12.2289215
Event: SPIE OPTO, 2018, San Francisco, California, United States
Abstract
A remarkable new electronic ground-state of a high-temperature superconductor oxide (YBa2Cu3O7−δ) is found when it is grown in-between layers of a specific manganite (Pr0.5La0.2Ca0.3MnO3). The superconductor in these ‘superconductor sandwiches’ apparently adopts an exotic granular-state due to an interaction with the manganite. Uniquely, a strong magnetic field recovers a more ‘customary’ superconducting state. Here we show how Raman spectroscopy, state-of-the-art THz ellipsometry, and transport measurements are being used to reveal the nature of this new ground-state. These measurements are shedding light on how the manganite and superconductor layers interact to cause such novel behaviour, however the exact mechanism remains unknown.
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B. P. P. Mallett, P. Marsik, J. Khmaladze, R. Arul, M. Minola, M. C. Simpson, and C. Bernhard "Superconductor sandwiches: cuprate-manganite multilayers with a remarkable new ground state", Proc. SPIE 10533, Oxide-based Materials and Devices IX, 105330Y (23 February 2018); https://doi.org/10.1117/12.2289215
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KEYWORDS
Magnetism
Superconductors
Multilayers
Raman spectroscopy
Manganese
Thin films
Terahertz radiation
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