Indexed by: Journal paper

First Author: Hongming Weng

Correspondence Author: Zhong Fang,Xi Dai

Co-author: Shou-Cheng Zhang,Haijun Zhang,Gang Xu

Journal: Physical Review B

Included Journals: SCI

Discipline: 物理学

Document Type: J

Volume: 84

Issue: 6

Page Number: 060408

ISSN No.: 2469-9950

Date of Publication: 2011-08-30

Impact Factor: 3.691

Abstract: Based on first-principles calculations, we predict a half-metallic surface state in layered bulk insulator NaCoO2, with tunable surface hole concentration. The half-metallic surface has a single Fermi surface with a helical spin texture, similar to the surface state of topological insulators, but with the key difference of time-reversal symmetry breaking in the present case. We propose the realization of topological superconductivity and Majorana fermions when the half-metallic surface states are in proximity contact with a conventional superconductor.

Links to published journals: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.060408