Topological superconductivity on the surface of Fe-based superconductors

Abstract

As one of the simplest systems for realizing Majorana fermions, topological superconductor plays an important role in both condensed matter physics and quantum computations. Based on \emph{ab~initio} calculations and the analysis of an effective 8-band model with the superconducting pairing, we demonstrate that the three dimensional extended $s$-wave Fe-based superconductors such as Fe${}_{1+\text{y}}$Se${}_{0.5}$Te${}_{0.5}$ have a metallic topologically nontrivial band structure, and exhibit a normal-topological-normal superconductivity phase transition on the ($001$) surface by tuning the bulk carrier doping level. In the topological superconductivity (TSC) phase, a Majorana zero mode is trapped at the end of a magnetic vortex line. We further show that, the surface TSC phase only exists up to a certain bulk pairing gap, and there is a normal-topological phase transition driven by the temperature, which has not been discussed before. These results pave an effective way to realize the TSC and Majorana fermions in a large class of superconductors.

References in corpus (16)

• Non-Abelian Anyons and Topological Quantum Computation
• 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
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• The superconductivity at 18 K in LiFeAs system
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
• Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
• Doping-dependent Phase Diagram of LaO{\it M}As ({\it M}=V--Cu) and Electron-type Superconductivity near Ferromagnetic Instability
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Majorana End-States in Multi-band Microstructures with Rashba Spin-Orbit Coupling
• Topological Phases in the Single-Layer FeSe
• Imaging atomic-scale effects of high-energy ion irradiation on superconductivity and vortex pinning in Fe(Se,Te)
• Electron-hole Asymmetry and Quantum Critical Point in Hole-doped BaFe${}_2$As${}_2$
• Absence of a Proximity Effect in a Topological Insulator on a Cuprate Superconductor: Bi2Se3/Bi2Sr2CaCu2O8

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