Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3

被引：3101

作者：

Chen, Y. L. ^{[1
,2
,3
,4
]}

Analytis, J. G. ^{[1
,2
,3
]}

Chu, J. -H. ^{[1
,2
,3
]}

Liu, Z. K. ^{[1
,2
,3
]}

Mo, S. -K. ^{[1
,2
,3
,4
]}

Qi, X. L. ^{[1
,2
,3
]}

Zhang, H. J. ^{[5
,6
]}

Lu, D. H. ^{[1
]}

Dai, X. ^{[5
,6
]}

Fang, Z. ^{[5
,6
]}

Zhang, S. C. ^{[1
,2
,3
]}

Fisher, I. R. ^{[1
,2
,3
]}

Hussain, Z. ^{[4
]}

Shen, Z. -X. ^{[1
,2
,3
]}

机构：

[1] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[2] Stanford Univ, Dept Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[5] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

SCIENCE | 2009年 / 325卷 / 5937期

关键词：

HGTE QUANTUM-WELLS; SINGLE DIRAC CONE; SURFACE; PHASE; TRANSITION; STATE;

D O I：

10.1126/science.1173034

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Three-dimensional topological insulators are a new state of quantum matter with a bulk gap and odd number of relativistic Dirac fermions on the surface. By investigating the surface state of Bi2Te3 with angle-resolved photoemission spectroscopy, we demonstrate that the surface state consists of a single nondegenerate Dirac cone. Furthermore, with appropriate hole doping, the Fermi level can be tuned to intersect only the surface states, indicating a full energy gap for the bulk states. Our results establish that Bi2Te3 is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface. The large bulk gap of Bi2Te3 also points to promising potential for high-temperature spintronics applications.

引用

页码：178 / 181

页数：4

共 25 条

[1]

AKHNMEROV AR, 2009, PHYS REV LETT, V102, P6404

[2] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].

Bernevig, B. Andrei ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

SCIENCE, 2006, 314 (5806) :1757-1761

[3] Quantum spin hall effect [J].

Bernevig, BA ;

Zhang, SC .

PHYSICAL REVIEW LETTERS, 2006, 96 (10)

[4] Helical edge and surface states in HgTe quantum wells and bulk insulators [J].

Dai, Xi ;

Hughes, Taylor L. ;

Qi, Xiao-Liang ;

Fang, Zhong ;

Zhang, Shou-Cheng .

PHYSICAL REVIEW B, 2008, 77 (12)

[5] Topological insulators in three dimensions [J].

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[6] Topological insulators with inversion symmetry [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW B, 2007, 76 (04)

[7] Superconducting proximity effect and Majorana fermions at the surface of a topological insulator [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (09)

[8] Probing Neutral Majorana Fermion Edge Modes with Charge Transport [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2009, 102 (21)

[9] A topological Dirac insulator in a quantum spin Hall phase [J].

Hsieh, D. ;

Qian, D. ;

Wray, L. ;

Xia, Y. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2008, 452 (7190) :970-U5

[10] Quantum spin Hall effect in graphene [J].

Kane, CL ;

Mele, EJ .

PHYSICAL REVIEW LETTERS, 2005, 95 (22)

← 1 2 3 →