Topological Phases in the Single-Layer FeSe

Abstract

A distinct electronic structure was observed in the single-layer FeSe which shows surprising high temperature superconductivity over 65k. Here we demonstrate that the electronic structure can be explained by the strain effect due to substrates. More importantly, we find that this electronic structure can be tuned into robust topological phases from a topologically trivial metallic phase by the spin-orbital interaction and couplings to substrates. The topological phase is robust against any perturbations that preserve the time-reversal symmetry. Our studies suggest that topological phases and topologically related properties such as Majorana Fermions can be realized in iron-based high T${}_c$ superconductors.

9 pages, 5 figues

References in corpus (17)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators with Inversion Symmetry
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Topological Crystalline Insulators
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• One-dimensional Topological Edge States of Bismuth Bilayers
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Atomic and electronic structures of FeSe monolayer and bilayer thin films on SrTiO${}_3$ (001): a first-principles study
• The Evolution of Magnetism in Iron from the Atom to the Bulk
• Edge and Interfacial States in a 2D Topological Insulator:Bi(111) Bilayer on Bi${}_2$Te${}_2$Se
• Effects of charge doping and constrained magnetization on the electronic structure of an FeSe monolayer
• Tight-binding Hamiltonian for LaOFeAs

Cited by in corpus (11)

• Electronic Structure and Superconductivity of FeSe-Related Superconductors
• A comprehensive review on topological superconducting materials and interfaces
• CaFeAs${}_2$: a Staggered Intercalation of Quantum Spin Hall and High Temperature Superconductivity
• Interplay of nematic and magnetic orders in FeSe under pressure
• Effects of magnetic dopants in (Li${}_{0.8}$M${}_{0.2}$OH)FeSe (M = Fe, Mn, Co): a density-functional theory study using band unfolding technique
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Edge states at nematic domain walls in FeSe films
• Correlation-corrected band topology and topological surface states in iron-based superconductors
• Emergent vortex Majorana zero mode in iron-based superconductors
• Tomonaga Luttinger liquid in the topological edge channel of multilayer FeSe
• LaO as a candidate substrate for realizing superconductivity in FeSe epitaxial film