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

Jason N. Hancock; J.L.M. van Mechelen; Alexey B. Kuzmenko; Dirk van der Marel; Christoph Brüne; Elena G. Novik; Georgy V. Astakhov; Hartmut Buhmann; Laurens W. Molenkamp

doi:10.1103/PhysRevLett.107.136803

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

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

Research output: Contribution to journal › Article › Academic › peer-review

80 Citations (Scopus)

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 <1meV of the Fermi level. The technique is highly suitable for the pursuit of the topological magnetoelectric effect and axion electrodynamics.

Original language	English
Article number	136803
Number of pages	4
Journal	Physical Review Letters
Volume	107
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.107.136803
Publication status	Published - 21 Sept 2011
Externally published	Yes

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10.1103/PhysRevLett.107.136803

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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 <1meV of the Fermi level. The technique is highly suitable for the pursuit of the topological magnetoelectric effect and axion electrodynamics.",

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AU - Hancock, Jason N.

AU - van Mechelen, J.L.M.

AU - Kuzmenko, Alexey B.

AU - van der Marel, Dirk

AU - Brüne, Christoph

AU - Novik, Elena G.

AU - Astakhov, Georgy V.

AU - Buhmann, Hartmut

AU - Molenkamp, Laurens W.

PY - 2011/9/21

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N2 - 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 <1meV of the Fermi level. The technique is highly suitable for the pursuit of the topological magnetoelectric effect and axion electrodynamics.

AB - 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 <1meV of the Fermi level. The technique is highly suitable for the pursuit of the topological magnetoelectric effect and axion electrodynamics.

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

Abstract

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