Berry-Phase Switch in Electrostatically Confined Topological Surface States

Zhang，Jun1; Jiang，Ye Ping1; Ma，Xu Cun2,3; Xue，Qi Kun2,3,4

2022-03-25

10.1103/PhysRevLett.128.126402

PHYSICAL REVIEW LETTERS   影响因子和分区

0031-9007

1079-7114

Here, we visualize the trapping of topological surface states in the circular n-p junctions on the top surface of the seven-quintuple-layer three dimensional (3D) topological insulator (TI) Sb2Te3 epitaxial films. As shown by spatially dependent and field-dependent tunneling spectra, these trapped resonances show field-induced splittings between the degenerate time-reversal-symmetric states at zero magnetic field. These behaviors are attributed unambiguously to Berry-phase switch by comparing the experimental data with both numerical and semiclassical simulations. The successful electrostatic trapping of topological surface states in epitaxial films and the observation of Berry-phase switch provide a rich platform of exploiting new ideas for TI-based quantum devices.

SCI ; EI

英语

NI期刊

其他

National Science Foundation of China[61804056,92065102,51788104,62074092]

Physics

Physics, Multidisciplinary

WOS:000787858100004

AMER PHYSICAL SOC

20221411921281

Antimony compounds ; Electric insulators ; Epitaxial growth ; Fruits ; Quantum theory ; Scanning tunneling microscopy ; Topological insulators ; Topology

Chemical Operations:802.3 ; Agricultural Products:821.4 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Classical Physics; Quantum Theory; Relativity:931 ; Quantum Theory; Quantum Mechanics:931.4 ; High Energy Physics; Nuclear Physics; Plasma Physics:932 ; Crystal Growth:933.1.2

PHYSICS

2-s2.0-85127560071

Scopus

1.Key Laboratory of Polar Materials and Devices (MOE),Department of Electronics,East China Normal University,Shanghai,200241,China
2.State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing,100084,China
3.Frontier Science Center for Quantum Information,Beijing,100084,China
4.Southern University of Science and Technology,Shenzhen,518055,China

Zhang，Jun,Jiang，Ye Ping,Ma，Xu Cun,et al. Berry-Phase Switch in Electrostatically Confined Topological Surface States[J]. PHYSICAL REVIEW LETTERS,2022,128(12).

Zhang，Jun,Jiang，Ye Ping,Ma，Xu Cun,&Xue，Qi Kun.(2022).Berry-Phase Switch in Electrostatically Confined Topological Surface States.PHYSICAL REVIEW LETTERS,128(12).

Zhang，Jun,et al."Berry-Phase Switch in Electrostatically Confined Topological Surface States".PHYSICAL REVIEW LETTERS 128.12(2022).