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Nonreciprocal transport in gate-induced polar superconductor SrTiO(3)
Polar conductors/superconductors with Rashba-type spin-orbit interaction are potential material platforms for quantum transport and spintronic functionalities. One of their inherent properties is the nonreciprocal transport, where the rightward and leftward currents become inequivalent, reflecting s...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7101218/ https://www.ncbi.nlm.nih.gov/pubmed/32258403 http://dx.doi.org/10.1126/sciadv.aay9120 |
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author | Itahashi, Yuki M. Ideue, Toshiya Saito, Yu Shimizu, Sunao Ouchi, Takumi Nojima, Tsutomu Iwasa, Yoshihiro |
author_facet | Itahashi, Yuki M. Ideue, Toshiya Saito, Yu Shimizu, Sunao Ouchi, Takumi Nojima, Tsutomu Iwasa, Yoshihiro |
author_sort | Itahashi, Yuki M. |
collection | PubMed |
description | Polar conductors/superconductors with Rashba-type spin-orbit interaction are potential material platforms for quantum transport and spintronic functionalities. One of their inherent properties is the nonreciprocal transport, where the rightward and leftward currents become inequivalent, reflecting spatial inversion/time-reversal symmetry breaking. Such a rectification effect originating from the polar symmetry has been recently observed at interfaces or bulk Rashba semiconductors, while its mechanism in a polar superconductor remains elusive. Here, we report the nonreciprocal transport in gate-induced two-dimensional superconductor SrTiO(3), which is a Rashba superconductor candidate. In addition to the gigantic enhancement of nonreciprocal signals in the superconducting fluctuation region, we found kink and sharp peak structures around critical temperatures, which reflect the crossover behavior from the paraconductivity origin to the vortex origin, based on a microscopic theory. The present result proves that the nonreciprocal transport is a powerful tool for investigating the interfacial/polar superconductors without inversion symmetry, where rich exotic features are theoretically prognosticated. |
format | Online Article Text |
id | pubmed-7101218 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-71012182020-04-03 Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) Itahashi, Yuki M. Ideue, Toshiya Saito, Yu Shimizu, Sunao Ouchi, Takumi Nojima, Tsutomu Iwasa, Yoshihiro Sci Adv Research Articles Polar conductors/superconductors with Rashba-type spin-orbit interaction are potential material platforms for quantum transport and spintronic functionalities. One of their inherent properties is the nonreciprocal transport, where the rightward and leftward currents become inequivalent, reflecting spatial inversion/time-reversal symmetry breaking. Such a rectification effect originating from the polar symmetry has been recently observed at interfaces or bulk Rashba semiconductors, while its mechanism in a polar superconductor remains elusive. Here, we report the nonreciprocal transport in gate-induced two-dimensional superconductor SrTiO(3), which is a Rashba superconductor candidate. In addition to the gigantic enhancement of nonreciprocal signals in the superconducting fluctuation region, we found kink and sharp peak structures around critical temperatures, which reflect the crossover behavior from the paraconductivity origin to the vortex origin, based on a microscopic theory. The present result proves that the nonreciprocal transport is a powerful tool for investigating the interfacial/polar superconductors without inversion symmetry, where rich exotic features are theoretically prognosticated. American Association for the Advancement of Science 2020-03-27 /pmc/articles/PMC7101218/ /pubmed/32258403 http://dx.doi.org/10.1126/sciadv.aay9120 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Itahashi, Yuki M. Ideue, Toshiya Saito, Yu Shimizu, Sunao Ouchi, Takumi Nojima, Tsutomu Iwasa, Yoshihiro Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title | Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title_full | Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title_fullStr | Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title_full_unstemmed | Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title_short | Nonreciprocal transport in gate-induced polar superconductor SrTiO(3) |
title_sort | nonreciprocal transport in gate-induced polar superconductor srtio(3) |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7101218/ https://www.ncbi.nlm.nih.gov/pubmed/32258403 http://dx.doi.org/10.1126/sciadv.aay9120 |
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