Landau level spectroscopy of PbSnSe topological crystalline insulator

We report on an infrared magneto-spectroscopy study of Pb\(_{1-x}\)Sn\(_x\)Se, 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 res...

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Published in:arXiv.org
Main Authors: Kristupas Kazimieras Tikuišis, Wyzula, Jan, Ohnoutek, Lukáš, Cejpek, Petr, Uhlířová, Klára, Hakl, Michael, Faugeras, Clément, Výborný, Karel, Ishida, Akihiro, Veis, Martin, Orlita, Milan
Format: Paper
Language:English
Published: Ithaca Cornell University Library, arXiv.org 29.03.2021
Subjects:
Crystal structure
Crystallinity
Electron states
Lead
Selenium
Spectrum analysis
Tin
Topology
ISSN:2331-8422
Online Access:Get full text
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Summary:We report on an infrared magneto-spectroscopy study of Pb\(_{1-x}\)Sn\(_x\)Se, 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 modelled 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 Pb\(_{1-x}\)Sn\(_x\)Se crystals in the inverted regime. Reasons for this unexpected result are discussed.
Bibliography:SourceType-Working Papers-1
ObjectType-Working Paper/Pre-Print-1
content type line 50
ISSN:2331-8422
DOI:10.48550/arxiv.2103.15959