Hidden sign-changing s-wave superconductivity in monolayer FeSe

Yi Gao; Yan Yu; Tao Zhou; Huaixiang Huang; Qiang-Hua Wang

doi:10.1103/PhysRevB.94.144512

← Back to search

Hidden sign-changing s-wave superconductivity in monolayer FeSe

Yi Gao, Yan Yu, Tao Zhou, Huaixiang Huang, Qiang-Hua Wang

DOI 10.1103/PhysRevB.94.144512 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	50	Pressure not reported	unknown
FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10	Pressure not reported	unknown