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Title: Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO 3 substrate

Abstract

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/SrTiO 3 heterostructures, the superconducting transition temperature in FeSe monolayer can be effectively raised by the interband photoexcitations in the SrTiO 3 substrate. Attributed to a light induced metastable polar distortion uniquely enabled by the FeSe/SrTiO 3 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 SrTiO 3 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.

Authors:
 [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2]
  1. West Virginia Univ., Morgantown, WV (United States); National Key Laboratory of Science and Technology on Power Sources, Tianjin Institute of Power Sources, Tianjin, (China)
  2. West Virginia Univ., Morgantown, WV (United States)
Publication Date:
Research Org.:
West Virginia Univ., Morgantown, WV (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1494448
Grant/Contract Number:  
SC0010399; SC0017632
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yang, Ming, Yan, Chenhui, Ma, Yanjun, Li, Lian, and Cen, Cheng. Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO3 substrate. United States: N. p., 2019. Web. doi:10.1038/s41467-018-08024-w.
Yang, Ming, Yan, Chenhui, Ma, Yanjun, Li, Lian, & Cen, Cheng. Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO3 substrate. United States. doi:10.1038/s41467-018-08024-w.
Yang, Ming, Yan, Chenhui, Ma, Yanjun, Li, Lian, and Cen, Cheng. Tue . "Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO3 substrate". United States. doi:10.1038/s41467-018-08024-w. https://www.osti.gov/servlets/purl/1494448.
@article{osti_1494448,
title = {Light induced non-volatile switching of superconductivity in single layer FeSe on SrTiO3 substrate},
author = {Yang, Ming and Yan, Chenhui and Ma, Yanjun and Li, Lian and Cen, Cheng},
abstractNote = {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.},
doi = {10.1038/s41467-018-08024-w},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: Raising TC by light in FeSe/SrTiO3 heterostructure. a Effects of UV light on FeSe/SrTiO3 were evaluated by transport measurements in van der Pauw geometry. Scanning tunneling microscope (STM) topography images of sample with and without FeTe capping layer are shown on the right. Scale bars indicate 100 nm.more » b Solid lines: sample resistances measured in dark (black) and under UV illumination (red), showing an increase in TC from 24 K to 30 K. Dashed lines plot the resistances measured with 9 T out-of-plane magnetic field. c Resistances measured at different UV intensities. Despite of the greater normal state resistance modulations at larger light intensities, the TC enhancement is intensity independent« less

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Works referenced in this record:

Room-temperature ferroelectricity in strained SrTiO3
journal, August 2004

  • Haeni, J. H.; Irvin, P.; Chang, W.
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Two-dimensional electron gas with universal subbands at the surface of SrTiO3
journal, January 2011

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.