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

[11] A tunable topological insulator in the spin helical Dirac transport regime [J].

Hsieh, D. ;

Xia, Y. ;

Qian, D. ;

Wray, L. ;

Dil, J. H. ;

Meier, F. ;

Osterwalder, J. ;

Patthey, L. ;

Checkelsky, J. G. ;

Ong, N. P. ;

Fedorov, A. V. ;

Lin, H. ;

Bansil, A. ;

Grauer, D. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2009, 460 (7259) :1101-1105

[12] Observation of Unconventional Quantum Spin Textures in Topological Insulators [J].

Hsieh, D. ;

Xia, Y. ;

Wray, L. ;

Qian, D. ;

Pal, A. ;

Dil, J. H. ;

Osterwalder, J. ;

Meier, F. ;

Bihlmayer, G. ;

Kane, C. L. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

SCIENCE, 2009, 323 (5916) :919-922

[13]

Hufner S., 1995, Photoelectron Spectroscopy: Principles and Applications

[14] Transport properties of Bi-rich Bi-Sb alloys [J].

Lenoir, B ;

Cassart, M ;

Michenaud, JP ;

Scherrer, H ;

Scherrer, S .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1996, 57 (01) :89-99

[15] Electronic structure and thermoelectric properties of bismuth telluride and bismuth selenide [J].

Mishra, SK ;

Satpathy, S ;

Jepsen, O .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (02) :461-470

[16] Topological invariants of time-reversal-invariant band structures [J].

Moore, J. E. ;

Balents, L. .

PHYSICAL REVIEW B, 2007, 75 (12)

[17] Spin-orbit interaction effect in the electronic structure of Bi2Te3 observed by angle-resolved photoemission spectroscopy [J].

Noh, H. -J. ;

Koh, H. ;

Oh, S. -J. ;

Park, J. -H. ;

Kim, H. -D. ;

Rameau, J. D. ;

Valla, T. ;

Kidd, T. E. ;

Johnson, P. D. ;

Hu, Y. ;

Li, Q. .

EPL, 2008, 81 (05)

[18] Two-dimensional gas of massless Dirac fermions in graphene [J].

Novoselov, KS ;

Geim, AK ;

Morozov, SV ;

Jiang, D ;

Katsnelson, MI ;

Grigorieva, IV ;

Dubonos, SV ;

Firsov, AA .

NATURE, 2005, 438 (7065) :197-200

[19]

Perdew JP, 1996, PHYS REV LETT, V77, P3865, DOI 10.1103/PhysRevLett.77.3865

[20] Topological field theory of time-reversal invariant insulators [J].

Qi, Xiao-Liang ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

PHYSICAL REVIEW B, 2008, 78 (19)

← 1 2 3 →