Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator

被引：1013

作者：

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

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

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

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

Igarashi, K. ^{[5
]}

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

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

Mo, S. K. ^{[4
]}

Moore, R. G. ^{[1
]}

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

Hashimoto, M. ^{[2
,3
,4
]}

Sasagawa, T. ^{[5
]}

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, Geballe Lab Adv Mat, Dept Phys, Stanford, CA 94305 USA

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

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

[5] Tokyo Inst Technol, Mat & Struct Lab, Kanagawa 2268503, Japan

来源：

SCIENCE | 2010年 / 329卷 / 5992期

关键词：

HGTE QUANTUM-WELLS; BI2TE3; SB2TE3; CONE;

D O I：

10.1126/science.1189924

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：

In addition to a bulk energy gap, topological insulators accommodate a conducting, linearly dispersed Dirac surface state. This state is predicted to become massive if time reversal symmetry is broken, and to become insulating if the Fermi energy is positioned inside both the surface and bulk gaps. We introduced magnetic dopants into the three-dimensional topological insulator dibismuth triselenide (Bi(2)Se(3)) to break the time reversal symmetry and further position the Fermi energy inside the gaps by simultaneous magnetic and charge doping. The resulting insulating massive Dirac fermion state, which we observed by angle-resolved photoemission, paves the way for studying a range of topological phenomena relevant to both condensed matter and particle physics.

引用

页码：659 / 662

页数：4

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