Observation of Time-Reversal-Protected Single-Dirac-Cone Topological-Insulator States in Bi2Te3 and Sb2Te3

被引：861

作者：

Hsieh, D. ^{[1
]}

Xia, Y. ^{[1
]}

Qian, D. ^{[1
]}

Wray, L. ^{[1
]}

Meier, F. ^{[2
,3
]}

Dil, J. H. ^{[2
,3
]}

Osterwalder, J. ^{[3
]}

Patthey, L. ^{[2
]}

Fedorov, A. V. ^{[4
]}

Lin, H. ^{[5
]}

Bansil, A. ^{[5
]}

Grauer, D. ^{[6
]}

Hor, Y. S. ^{[6
]}

Cava, R. J. ^{[6
]}

Hasan, M. Z. ^{[1
]}

机构：

[1] Princeton Univ, Joseph Henry Labs Phys, Princeton, NJ 08544 USA

[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[3] Univ Zurich Irchel, Inst Phys, CH-8057 Zurich, Switzerland

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[6] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.103.146401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the strongly spin-orbit coupled materials Bi2Te3 and Sb2Te3 and their derivatives belong to the Z(2) topological-insulator class. Using a combination of first-principles theoretical calculations and photoemission spectroscopy, we directly show that Bi2Te3 is a large spin-orbit-induced indirect bulk band gap (delta similar to 150 meV) semiconductor whose surface is characterized by a single topological spin-Dirac cone. The electronic structure of self-doped Sb2Te3 exhibits similar Z(2) topological properties. We demonstrate that the dynamics of spin-Dirac fermions can be controlled through systematic Mn doping, making these materials classes potentially suitable for topological device applications.

引用

页数：4

共 30 条

[1] Electrically Detected Interferometry of Majorana Fermions in a Topological Insulator [J].

Akhmerov, A. R. ;

Nilsson, Johan ;

Beenakker, C. W. J. .

PHYSICAL REVIEW LETTERS, 2009, 102 (21)

[2]

Blaha P., 2001, COMPUTER CODE WIEN2K

[3]

CHEN YL, ARXIV09041829V1

[4]

DAY C, 2009, PHYS TODAY, V62, P12

[5] Magnetoelectric Polarizability and Axion Electrodynamics in Crystalline Insulators [J].

Essin, Andrew M. ;

Moore, Joel E. ;

Vanderbilt, David .

PHYSICAL REVIEW LETTERS, 2009, 102 (14)

[6]

Franz M., 2008, PHYSICS, V1, P36

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

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

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

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2009, 102 (21)

[9] p-type Bi2Se3 for topological insulator and low-temperature thermoelectric applications [J].

Hor, Y. S. ;

Richardella, A. ;

Roushan, P. ;

Xia, Y. ;

Checkelsky, J. G. ;

Yazdani, A. ;

Hasan, M. Z. ;

Ong, N. P. ;

Cava, R. J. .

PHYSICAL REVIEW B, 2009, 79 (19)

[10] 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

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