2016/11/05 by Xia Dai, Congcong Le, Xianxin Wu +3
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Dirac (video compression format) #Geometry #Graphene research and applications #Materials science #Mathematics #Phase (matter) #Physics #Quantum #Quantum mechanics #Surface (topology) #Surface states #Topological Materials and Phenomena #Topological insulator #Topological order #Topology (electrical circuits) #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1088/0256-307x/33/12/127301
published as Chin. Phys. Lett. 33, 127301 (2016) · 6 pages, 5 figures, 2 tables
arxiv created 2016/11/05 · openalex publication_date 2016/12/01 · arxiv updated 2016/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We predict that a non-centrosymmetric material NaSnBi locates in a three-dimensional non-trivial topological phase under ambient pressure based on first-principle calculations. By deriving the effective model around the Γ point, we find that the topological phase transition is driven by a Rashba spin-orbital coupling through an odd number of pairs of band touch due to a small anisotropic gap caused by quintic dispersion terms. In contrast to conventional topological insulators, the spin texture of the surface Dirac cone is right-handed and the surface states are strikingly different for different surface terminations.