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Observation of cyclotron antiresonance in the topological insulator Bi2Te3

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arxiv 1809.09492 v1 pith:2YO5VK3B submitted 2018-09-25 cond-mat.str-el cond-mat.mes-hallphysics.plasm-ph

Observation of cyclotron antiresonance in the topological insulator Bi2Te3

S.V. Dordevic , Hechang Lei , C. Petrovic , J. Ludwig , Z.Q. Li , D. Smirnov This is my paper
classification cond-mat.str-el cond-mat.mes-hallphysics.plasm-ph
keywords antiresonancecyclotrontopologicalfieldforminsulatormagneticobservation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report on the experimental observation of a cyclotron antiresonance in a canonical 3D topological insulator Bi$_2$Te$_3$. Magneto-reflectance response of single crystal Bi$_2$Te$_3$ was studied in 18 Tesla magnetic field, and compared to other topological insulators studied before, the main spectral feature is inverted. We refer to it as an antiresonance. In order to describe this unconventional behavior we propose the idea of an imaginary cyclotron resonance frequency, which on the other hand indicates that the form of the Lorentz force that magnetic field exerts on charge carriers takes an unconventional form.

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