Scanning tunneling microscopy study of the possible topological surface states in BiTeCl

被引：8

作者：

Yan, Y. J. ^{[1
,2
]}

Ren, M. Q. ^{[1
,2
]}

Liu, X. ^{[1
,2
]}

Huang, Z. C. ^{[1
,2
]}

Jiang, J. ^{[1
,2
]}

Fan, Q. ^{[1
,2
]}

Miao, J. ^{[1
,2
]}

Xie, B. P. ^{[1
,2
,3
]}

Xiang, F. ^{[4
]}

Wang, X. ^{[4
]}

Zhang, T. ^{[1
,2
,3
]}

Feng, D. L. ^{[1
,2
,3
]}

机构：

[1] Fudan Univ, State Key Lab Surface Phys, Dept Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[3] Fudan Univ, Collaborat Innovat Ctr Adv Microstruct, Shanghai 200433, Peoples R China

[4] Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat, North Wollongong, NSW 2500, Australia

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2015年 / 27卷 / 47期

基金：

美国国家科学基金会;

关键词：

topological surface states; BiTeCl; non-centrosymmetric; SINGLE DIRAC CONE; INSULATOR; BI2TE3; PHASE;

D O I：

10.1088/0953-8984/27/47/475004

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Recently, the non-centrosymmetric bismuth tellurohalides such as BiTeCl are being studied as possible candidates for topological insulators. While some photoemission studies showed that BiTeCl is an inversion asymmetric topological insulator, others showed that it is a normal semiconductor with Rashba splitting. Meanwhile, first-principle calculations have failed to confirm the existence of topological surface states in BiTeCl so far. Therefore, the topological nature of BiTeCl requires further investigation. Here we report a low-temperature scanning tunneling microscopy study on the surface states of BiTeCl single crystals. On the tellurium (Te)-terminated surfaces with relatively low defect density, evidence for topological surface states is observed in the quasi-particle interference patterns, both in the anisotropy of the scattering vectors and the fast decay of the interference near the step edges. Meanwhile, on the samples with much higher defect densities, we observed surface states that behave differently. Our results may help to resolve the current controversy on the topological nature of BiTeCl.

引用

页数：6

共 28 条

[1] STM Imaging of Electronic Waves on the Surface of Bi2Te3: Topologically Protected Surface States and Hexagonal Warping Effects [J].

Alpichshev, Zhanybek ;

Analytis, J. G. ;

Chu, J. -H. ;

Fisher, I. R. ;

Chen, Y. L. ;

Shen, Z. X. ;

Fang, A. ;

Kapitulnik, A. .

PHYSICAL REVIEW LETTERS, 2010, 104 (01)

[2] Emergence of non-centrosymmetric topological insulating phase in BiTeI under pressure [J].

Bahramy, M. S. ;

Yang, B. -J. ;

Arita, R. ;

Nagaosa, N. .

NATURE COMMUNICATIONS, 2012, 3

[3] Mapping polarization induced surface band bending on the Rashba semiconductor BiTeI [J].

Butler, Christopher John ;

Yang, Hung-Hsiang ;

Hong, Jhen-Yong ;

Hsu, Shih-Hao ;

Sankar, Raman ;

Lu, Chun-I ;

Lu, Hsin-Yu ;

Yang, Kui-Hon Ou ;

Shiu, Hung-Wei ;

Chen, Chia-Hao ;

Kaun, Chao-Cheng ;

Shu, Guo-Jiun ;

Chou, Fang-Cheng ;

Lin, Minn-Tsong .

NATURE COMMUNICATIONS, 2014, 5

[4] Quantum oscillations in Rashba semiconductor BiTeCl [J].

Chen, F. ;

Zhao, D. ;

Xiang, Z. J. ;

Shang, C. ;

Luo, X. G. ;

Pan, B. Y. ;

Li, S. Y. ;

Wu, T. ;

Chen, X. H. .

PHYSICAL REVIEW B, 2014, 90 (20)

[5]

Chen YL, 2013, NAT PHYS, V9, P704, DOI [10.1038/NPHYS2768, 10.1038/nphys2768]

[6] Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3 [J].

Chen, Y. L. ;

Analytis, J. G. ;

Chu, J. -H. ;

Liu, Z. K. ;

Mo, S. -K. ;

Qi, X. L. ;

Zhang, H. J. ;

Lu, D. H. ;

Dai, X. ;

Fang, Z. ;

Zhang, S. C. ;

Fisher, I. R. ;

Hussain, Z. ;

Shen, Z. -X. .

SCIENCE, 2009, 325 (5937) :178-181

[7] Giant Ambipolar Rashba Effect in the Semiconductor BiTeI [J].

Crepaldi, A. ;

Moreschini, L. ;

Autes, G. ;

Tournier-Colletta, C. ;

Moser, S. ;

Virk, N. ;

Berger, H. ;

Bugnon, Ph ;

Chang, Y. J. ;

Kern, K. ;

Bostwick, A. ;

Rotenberg, E. ;

Yazyev, O. V. ;

Grioni, M. .

PHYSICAL REVIEW LETTERS, 2012, 109 (09)

[8] IMAGING STANDING WAVES IN A 2-DIMENSIONAL ELECTRON-GAS [J].

CROMMIE, MF ;

LUTZ, CP ;

EIGLER, DM .

NATURE, 1993, 363 (6429) :524-527

[9] Ideal Two-Dimensional Electron Systems with a Giant Rashba-Type Spin Splitting in Real Materials: Surfaces of Bismuth Tellurohalides [J].

Eremeev, S. V. ;

Nechaev, I. A. ;

Koroteev, Yu M. ;

Echenique, P. M. ;

Chulkov, E. V. .

PHYSICAL REVIEW LETTERS, 2012, 108 (24)

[10] Hexagonal Warping Effects in the Surface States of the Topological Insulator Bi2Te3 [J].

Fu, Liang .

PHYSICAL REVIEW LETTERS, 2009, 103 (26)

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