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Surface state charge dynamics of a high-mobility three dimensional topological insulator

By Jason N. Hancock, J. L. M. van Mechelen, Alexey B. Kuzmenko, Dirk van der Marel, Cristoph Brüne, Elina G. Novik, Georgy V. Astakhov, Hartmut Buhmann and Laurens W. Molenkamp

Abstract

We present a magneto-optical study of the three-dimensional topological insulator, strained HgTe using a technique which capitalizes on advantages of time-domain spectroscopy to amplify the signal from the surface states. This measurement delivers valuable and precise information regarding the surface state dispersion within <1 meV of the Fermi level. The technique is highly suitable for the pursuit of the topological magnetoelectric effect and axion electrodynamics.Comment: Published version, online Sept 23, 201

Topics: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
Year: 2011
DOI identifier: 10.1103/PhysRevLett.107.136803
OAI identifier: oai:arXiv.org:1105.0884
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