An extensive impurity-scattering study on the pairing symmetry of monolayer FeSe films on SrTiO3

Abstract

Determination of the pairing symmetry in monolayer FeSe films on SrTiO3 is a requisite for understanding the high superconducting transition temperature in this system, which has attracted intense theoretical and experimental studies but remains controversial. Here, by introducing several types of point defects in FeSe monolayer films, we conduct a systematic investigation on the impurity-induced electronic states by spatially resolved scanning tunneling spectroscopy. Ranging from surface adsorption, chemical substitution to intrinsic structural modification, these defects generate a variety of scattering strength, which renders new insights on the pairing symmetry.

arXiv commentto be published in Phys. Rev. B Regular Article

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Cited by in corpus (11)

• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Evidence for d-wave superconductivity in single layer FeSe/SrTiO3 probed by quasiparticle scattering off step edges
• Detection of bosonic mode as a signature of magnetic excitation in one unit cell FeSe on SrTiO3
• Heterostructural one-unit-cell FeSe/SrTiO3: from high-temperature superconductivity to topological states
• Tuning stoichiometry and its impact on superconductivity of monolayer and multilayer FeSe on SrTiO3
• Multichannel superconductivity of monolayer FeSe on SrTiO${}_3$: Interplay of spin fluctuations and electron-phonon interaction
• Charge order driven by multiple-Q spin fluctuations in heavily electron-doped iron selenide superconductors
• The study of intrinsic defect state of FeSe with scanning tunneling microscopy
• Stoichiometry and defect superstructures in epitaxial FeSe films on SrTiO3
• Anisotropic gap structure and sign reversal symmetry in monolayer Fe(Se,Te)
• Nesting-induced Local Electronic Patterns around a Single As (Te, Se) Vacancy in Iron-based Superconductors