Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO3 substrate

Yang, Ming; Yan, Chenhui; Ma, Yanjun; Li, Lian; Cen, Cheng

doi:10.1038/s41467-018-08024-w

Title: Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO₃ substrate

Journal Article · 08 January 2019 · Nature Communications

DOI: https://doi.org/10.1038/s41467-018-08024-w · OSTI ID:1494448

Yang, Ming ^[1];

^[2]; Ma, Yanjun ^[2]; Li, Lian ^[2];

^[2]

West Virginia Univ., Morgantown, WV (United States); National Key Laboratory of Science and Technology on Power Sources, Tianjin Institute of Power Sources, Tianjin, (China)
West Virginia Univ., Morgantown, WV (United States)

The capability of controlling superconductivity by light is highly desirable for active quantum device applications. Since superconductors rarely exhibit strong photoresponses, and optically sensitive materials are often not superconducting, efficient coupling between these two characters can be very challenging in a single material. Here we show that, in FeSe/SrTiO₃ heterostructures, the superconducting transition temperature in FeSe monolayer can be effectively raised by the interband photoexcitations in the SrTiO₃ substrate. Attributed to a light induced metastable polar distortion uniquely enabled by the FeSe/SrTiO₃ interface, this effect only requires a less than 50 μWcm^-2 continuous-wave light field. The fast optical generation of superconducting zero resistance state is non-volatile but can be rapidly reversed by applying voltage pulses to the back of SrTiO₃ substrate. The capability of switching FeSe repeatedly and reliably between normal and superconducting states demonstrate the great potential of making energy-efficient quantum optoelectronics at designed correlated interfaces.

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Research Organization:: West Virginia Univ., Morgantown, WV (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0010399; SC0017632

OSTI ID:: 1494448

Journal Information:: Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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