Landau level spectroscopy of the PbSnSe topological crystalline insulator

Kristupas Kazimieras Tikuisis, Jan Wyzula, Lukas Ohnoutek, Petr Cejpek, Klara Uhlirova, Michael Hakl, Clement Faugeras, Karel Vyborný, Akihiro Ishida, Martin Veis, Milan Orlita

Research output: Contribution to journalArticlepeer-review

Abstract

We report on an infrared magnetospectroscopy study of Pb1-xSnxSe, a topological crystalline insulator. We have examined a set of samples, all in the inverted regime of electronic bands, with the tin composition varying from x=0.2 to 0.33. Our analysis shows that the observed response, composed of a series of interband inter-Landau-level excitations, can be interpreted and modeled using the relativistic-like Hamiltonian for three-dimensional massive Dirac electrons, expanded to include diagonal quadratic terms that impose band inversion. In our data, we have not found any clear signature of massless electron states that are present on the surface of Pb1-xSnxSe crystals in the inverted regime. Reasons for this unexpected result are discussed.

Original languageEnglish
Article number155304
JournalPhysical Review B
Volume103
Issue number15
DOIs
Publication statusPublished - 12 Apr 2021

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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