Hidden sign-changing s-wave superconductivity in monolayer FeSe

Yi Gao, Yan Yu, Tao Zhou, Huaixiang Huang, and Qiang-Hua Wang
Phys. Rev. B 94, 144512 – Published 21 October 2016

Abstract

Combining the recent scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) measurements, we construct a tight-binding model suitable for describing the band structure of monolayer FeSe grown on SrTiO3. Then we propose a possible pairing function, which can well describe the gap anisotropy observed by ARPES and has a hidden sign-changing characteristic. Finally, as a test of this pairing function, we further study the nonmagnetic impurity-induced bound states, to be verified by future STM experiments.

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  • Received 15 April 2016
  • Revised 25 September 2016

DOI:https://doi.org/10.1103/PhysRevB.94.144512

©2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yi Gao1, Yan Yu1, Tao Zhou2, Huaixiang Huang3, and Qiang-Hua Wang4,5

  • 1Department of Physics, Nanjing Normal University, Nanjing 210023, China
  • 2College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 3Department of Physics, Shanghai University, Shanghai 200444, China
  • 4National Laboratory of Solid State Microstructures & School of Physics, Nanjing University, Nanjing 210093, China
  • 5Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China

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Issue

Vol. 94, Iss. 14 — 1 October 2016

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