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26 April 2024 |
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Article overview
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Common Electronic Origin of Superconductivity in (Li,Fe)OHFeSe Bulk Superconductor and Single-Layer FeSe/SrTiO3 Films | | Lin Zhao
; Aiji Liang
; Dongna Yuan
; Yong Hu
; Defa Liu
; Jianwei Huang
; Shaolong He
; Bing Shen
; Yu Xu
; Xu Liu
; Li Yu
; Guodong Liu
; Huaxue Zhou
; Yulong Huang
; Xiaoli Dong
; Fang Zhou
; Zhongxian Zhao
; Chuangtian Chen
; Zuyan Xu
; X. J. Zhou
; | | Date: |
23 May 2015 | | Abstract: | The mechanism of high temperature superconductivity in the iron-based
superconductors remains an outstanding issue in condensed matter physics. The
electronic structure, in particular the Fermi surface topology, is considered
to play an essential role in dictating the superconductivity. Recent revelation
of distinct electronic structure and possible high temperature
superconductivity with a transition temperature Tc above 65 K in the
single-layer FeSe films grown on the SrTiO3 substrate provides key information
on the roles of Fermi surface topology and interface in inducing or enhancing
superconductivity. Here we report high resolution angle-resolved photoemission
measurement on the electronic structure and superconducting gap of a novel
FeSe-based superconductor, (Li0.84Fe0.16)OHFe0.98Se, with a Tc at 41 K. We find
that this single-phase bulk superconductor shows remarkably similar electronic
behaviors to that of the superconducting single-layer FeSe/SrTiO3 film in terms
of Fermi surface topology, band structure and nearly isotropic superconducting
gap without nodes. These observations provide significant insights in
understanding high temperature superconductivity in the single-layer
FeSe/SrTiO3 film in particular, and the mechanism of superconductivity in the
iron-based superconductors in general. | | Source: | arXiv, 1505.6361 | | Services: | Forum | Review | PDF | Favorites | |
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