Giant Magneto-Optical Kerr Effect and Universal Faraday Effect in Thin-Film Topological Insulators

被引：475

作者：

Tse, Wang-Kong ^{[1
]}

MacDonald, A. H. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 05期

关键词：

SINGLE DIRAC CONE; BI2TE3;

D O I：

10.1103/PhysRevLett.105.057401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Topological insulators can exhibit strong magneto-electric effects when their time-reversal symmetry is broken. In this Letter we consider the magneto-optical Kerr and Faraday effects of a topological insulator thin film weakly exchange coupled to a ferromagnet. We find that its Faraday rotation has a universal value at low frequencies theta(F) = tan(-1 alpha), where alpha is the vacuum fine structure constant, and that it has a giant Kerr rotation theta(K) = pi/2. These properties follow from a delicate interplay between thin-film cavity confinement and the surface Hall conductivity of a topological insulator's helical quasiparticles.

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共 24 条

[1] 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

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

Essin, Andrew M. ;

Moore, Joel E. ;

Vanderbilt, David .

PHYSICAL REVIEW LETTERS, 2009, 102 (14)

[3] Optical far-infrared properties of a graphene monolayer and multilayer [J].

Falkovsky, L. A. ;

Pershoguba, S. S. .

PHYSICAL REVIEW B, 2007, 76 (15)

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

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[5]

HEISH D, 2009, SCIENCE, V323, P919

[6] 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

[7] Observation of Time-Reversal-Protected Single-Dirac-Cone Topological-Insulator States in Bi2Te3 and Sb2Te3 [J].

Hsieh, D. ;

Xia, Y. ;

Qian, D. ;

Wray, L. ;

Meier, F. ;

Dil, J. H. ;

Osterwalder, J. ;

Patthey, L. ;

Fedorov, A. V. ;

Lin, H. ;

Bansil, A. ;

Grauer, D. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

PHYSICAL REVIEW LETTERS, 2009, 103 (14)

[8] 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

[9]

MACIEJKO, ARXIV10042514V2

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

Moore, J. E. ;

Balents, L. .

PHYSICAL REVIEW B, 2007, 75 (12)