Giant Magneto-Optical Kerr Effect and Universal Faraday Effect in Thin-Film Topological Insulators
نویسندگان
چکیده
منابع مشابه
Giant magneto-optical Kerr effect and universal Faraday effect in thin-film topological insulators.
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 θF=tan(-1)α, where α is the vacuum fine structure constant,...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2010
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.105.057401