Surface State Charge Dynamics of a High-Mobility Three-Dimensional Topological Insulator

Jason N. Hancock¹, J. L. M. van Mechelen¹, Alexey B. Kuzmenko¹, Dirk van der Marel¹, Christoph Brüne², Elena G. Novik², Georgy V. Astakhov², Hartmut Buhmann², and Laurens W. Molenkamp^2
1Département de Physique de la Matière Condensée, Université de Genève, quai Ernest-Ansermet 24, CH 1211 Genève 4, Switzerland
²Physikalisches Institut der Universität Würzburg - 97074 Würzburg, Germany

 

URL: http://link.aps.org/doi/10.1103/PhysRevLett.107.136803

DOI: 10.1103/PhysRevLett.107.136803

PACS: 73.25.+i, 03.65.Vf, 73.20.Mf, 78.20.Ls

© 2011 +American Physical Society

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.

 

The measurements in this paper were acquired using +TeraView's TPS Spectra 3000. Please visit our webpage on Publications on Terahertz Technology to view or download more papers.