Probing Quantum Capacitance in a 3D Topological Insulator

Kozlov, D. A. and Bauer, D. and Ziegler, J. and Fischer, R. and Savchenko, M. L. and Kvon, Z. D. and Mikhailov, N. N. and Dvoretsky, S. A. and Weiss, D. (2016) Probing Quantum Capacitance in a 3D Topological Insulator. PHYSICAL REVIEW LETTERS, 116 (16): 166802. ISSN 0031-9007, 1079-7114

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Abstract

We measure the quantum capacitance and probe thus directly the electronic density of states of the high mobility, Dirac type two-dimensional electron system, which forms on the surface of strained HgTe. Here we show that observed magnetocapacitance oscillations probe-in contrast to magnetotransport-primarily the top surface. Capacitance measurements constitute thus a powerful tool to probe only one topological surface and to reconstruct its Landau level spectrum for different positions of the Fermi energy.

Item Type: Article
Uncontrolled Keywords: DENSITY-OF-STATES; HGTE;
Subjects: 500 Science > 530 Physics
Divisions: Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
Depositing User: Dr. Gernot Deinzer
Date Deposited: 05 Apr 2019 07:20
Last Modified: 05 Apr 2019 07:20
URI: https://pred.uni-regensburg.de/id/eprint/3062

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