ARPES Study on Layer-Dependent Electronic Structure of FeSe/SrTiO3 Films

ORAL

Abstract

the recent discover of high-Tc superconductivity in a single-layer FeSe/SrTiO3 film has attracted much attention.. Our previous ARPES studies on the FeSe/SrTiO3 films have observeddistinct electronic structure of the single-layer FeSe/SrTiO3 film, established a phase diagram and observed a signature of high Tc over 65K in the annealed single-layer FeSe/SrTiO3 films, revealed thedichotomy of electronic structure and superconductivity between the single-layer and double-layer FeSe/SrTiO3 films, and observed an insulator-superconductor transition in the single-layer FeSe/SrTiO3 films. In this talk, we will present our new ARPES results on the FeSe/SrTiO3 films with many different layers, from single-layer up to 50-layers. This systematic study will provide insight in understanding the evolution of electronic structure and superconductivity from the single-layer FeSe film, to multiple-layer FeSe film and eventually to the bulk FeSe superconductor.

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Authors

  • Defa Liu

    • Chinese Academy of Sci (CAS)

  • Lin Zhao

    • National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sci (CAS)
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Xu Liu

    • Chinese Academy of Sci (CAS)

  • Shaolong He

    • Chinese Academy of Sci (CAS)
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Yong Hu

    • Chinese Academy of Sci (CAS)

  • Junfeng He

    • Chinese Academy of Sci (CAS)

  • Wenhao Zhang

    • Tsinghua university

  • Fangsen Li

    • Chinese Academy of Sci (CAS)

  • Chenjia Tang

    • Tsinghua university

  • Zhi Li

    • Chinese Academy of Sci (CAS)

  • Lili Wang

    • Chinese Academy of Sci (CAS)

  • Guodong Liu

    • Chinese Academy of Sci (CAS)

  • Jun Zhang

    • Chinese Academy of Sci (CAS)

  • Chuangtian Chen

    • Chinese Academy of Sci (CAS)

  • Zuyan Xu

    • Chinese Academy of Sci (CAS)

  • Xi Chen

    • Tsinghua university

  • Xucun Ma

    • Chinese Academy of Sci (CAS)

  • Qikun Xue

    • Tsinghua university

  • Xingjiang Zhou

    • Chinese Academy of Sci (CAS)
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China