Reentrant topological phases in Mn-doped HgTe quantum wells

W. Beugeling, C. X. Liu, E. G. Novik, L. W. Molenkamp, C. Morais Smith

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Abstract

Quantum wells of HgTe doped with Mn display the quantum anomalous Hall effect due to the magnetic moments of the Mn ions. In the presence of a magnetic field, these magnetic moments induce an effective nonlinear Zeeman effect, causing a nonmonotonic bending of the Landau levels. As a consequence, the quantized (spin) Hall conductivity exhibits a reentrant behavior as one increases the magnetic field. Here, we will discuss the appearance of different types of reentrant behavior as a function of Mn concentration, well thickness, and temperature, based on the qualitative form of the Landau-level spectrum in an effective four-band model.

Original languageEnglish (US)
Article number195304
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number19
DOIs
StatePublished - May 4 2012

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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