Confined-path interference suppressed quantum correction on weak antilocalization effect in a BiSbTeSe2 topological insulator

Qin, Lai-Xiang1; Pan, Xin-Chen2,3; Song, Feng-Qi2,3; Zhang, Liang1; Sun, Zhang-Hao1; Li, Ming-Qiang4; Gao, Peng4,5,6; Lin, Ben-Chuan1; Huang, Shiu-Ming7; Zhu, Rui4; Xu, Jun4; Lin, Fang1; Lu, Hai-Zhou8,9; Yu, Dapeng1,8,9; Liao, Zhi-Min1,5

2018-01-15

10.1063/1.5009507

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

We have studied the magnetoconductance in a topological insulator BiSbTeSe2 with different probe lengths. The magnetoconductance correction reduces by a factor of 2 when the probe length is comparable to the phase coherence length, L-phi, and the related weak antilocalization prefactor, alpha, reduces by a factor of 2. L-phi is independent of the probe length and follows the T-0.5, corresponding to the two-dimensional electron-electron interaction. alpha shows similar back-gate voltage dependence and L-phi is almost the same in both short and long channels. This indicates that the widely reported surface-to-bulk coupling is not the dominant mechanism of the a reduction. Moreover, non-saturating magnetoresistances are observed and coincided with each other in the short and long channels. The reduced alpha is deemed to be due to the quantum correction effect caused by the geometries and electrode distribution. The finding here will further the understanding of the transport properties of the topological insulators and unveil exotic quantum phenomena. Published by AIP Publishing.

SCI ; EI

英语

NI论文

其他

Taiwan National Science Council[MOST 103-2112-M-110-009-MY3] ; Taiwan National Science Council[MOST 106-2112-M-110-002]

Physics

Physics, Applied

WOS:000423027300023

AMER INST PHYSICS

20180404670138

Antimony compounds ; Electric insulators ; Electron-electron interactions ; Probes ; Quantum chemistry ; Selenium compounds ; Tellurium compounds

Physical Chemistry:801.4 ; Atomic and Molecular Physics:931.3

PHYSICS

Web of Science

1.Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
2.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
3.Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
4.Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China
5.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
6.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
7.Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan
8.South Univ Sci & Technol China, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
9.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China

Qin, Lai-Xiang,Pan, Xin-Chen,Song, Feng-Qi,et al. Confined-path interference suppressed quantum correction on weak antilocalization effect in a BiSbTeSe2 topological insulator[J]. APPLIED PHYSICS LETTERS,2018,112(3).

Qin, Lai-Xiang.,Pan, Xin-Chen.,Song, Feng-Qi.,Zhang, Liang.,Sun, Zhang-Hao.,...&Liao, Zhi-Min.(2018).Confined-path interference suppressed quantum correction on weak antilocalization effect in a BiSbTeSe2 topological insulator.APPLIED PHYSICS LETTERS,112(3).

Qin, Lai-Xiang,et al."Confined-path interference suppressed quantum correction on weak antilocalization effect in a BiSbTeSe2 topological insulator".APPLIED PHYSICS LETTERS 112.3(2018).