Reentrant topological phases in Mn-doped HgTe quantum wells

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

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

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

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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