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Quantum capacitance of a three-dimensional topological insulatorbased on HgTe

Kozlov, D. A. ; Bauer, D. ; Ziegler, Johannes ; Fischer, Ralf ; Savchenko, M. L. ; Kvon, Z. D. ; Mikhailov, N. N. ; Dvoretsky, S. A. ; Weiss, Dieter


The quantum capacitance that directly characterizes the density of states of highly mobile Dirac two-dimensional states formed on the surface of a stressed HgTe film is studied experimentally. It is shown that, as opposed to the oscillations in the magnetotransport to which all the existing types of carriers contribute, the quantum oscillations observed in the magnetic capacitance correspond to ...


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