Revision 2

Accepted · core change · record

Changes against revision 1:

Title: Pairing symmetry of heavily electron-doped FeSe without hole pockets
Plain: In some FeSe compounds only electron pockets remain at the Fermi level, so the standard sign-changing scenario between hole and electron pockets cannot apply.
Precise · changed · core: Revision 1: For monolayer FeSe on SrTiO3, (Li,Fe)OHFeSe and KxFe2-ySe2, which lack hole pockets at $\Gamma$, determine whether the gap changes sign between the electron pockets at $M$ (d-wave or bonding-antibonding $s\pm$) or is sign-preserving ($s++$). An answer is a phase-sensitive test, such as quasiparticle interference with magnetic and nonmagnetic defects or defect-bound in-gap states, with unambiguous sign assignment.; Revision 2: For monolayer FeSe on $\mathrm{SrTiO_3}$, (Li,Fe)OHFeSe and KxFe2-ySe2, which lack hole pockets at $\Gamma$, determine whether the gap changes sign between the electron pockets at $M$ (d-wave or bonding-antibonding $s\pm$) or is sign-preserving ($s++$). An answer is a phase-sensitive test, such as quasiparticle interference with magnetic and nonmagnetic defects or defect-bound in-gap states, with unambiguous sign assignment.
Settled by: Phase-referenced quasiparticle interference or impurity-state spectroscopy on two such compounds yielding the same sign structure.
Kind: well-posed
Answer type: identification
References: (empty)
Literature status: contested
Status note: (empty)
Posed since: (empty)

Decisions