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 language | English |
|---|---|
| Article number | 155304 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 12 Apr 2021 |
Bibliographical note
Funding Information:We acknowledge discussions with R. Buczko, P. E. de Faria Jr., Y. Fuseya, S. Tchoumakov, M. O. Goerbig, and M. Potemski. The work has been supported by the EC Graphene Flagship project, by the ANR COLECTOR project (ANR-17-CE30-0032), by the French-Czech exchange programme Barrande of MSMT (No. 8J18FR013), and Campus France (No. 40701ZF). XRD and EDS analysis was performed in MGML , which is supported within the program of Czech Research Infrastructures (Project No. LM2018096). We acknowledge the support of the LNCMI-CNRS in Grenoble, a member of the European Magnetic Field Laboratory (EMFL) . This work was also supported by the Ministry of Education,Youth and Sports from the Large Infrastructures for Research, Experimental Development and Innovations project “IT4 Innovations National Supercomputing Center - LM2015070” and by the OP VVV project MATFUN (Grant No. CZ.02.1.01/0.0/0.0/15_003/0000487).
Publisher Copyright:
© 2021 American Physical Society.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Funding
We acknowledge discussions with R. Buczko, P. E. de Faria Jr., Y. Fuseya, S. Tchoumakov, M. O. Goerbig, and M. Potemski. The work has been supported by the EC Graphene Flagship project, by the ANR COLECTOR project (ANR-17-CE30-0032), by the French-Czech exchange programme Barrande of MSMT (No. 8J18FR013), and Campus France (No. 40701ZF). XRD and EDS analysis was performed in MGML , which is supported within the program of Czech Research Infrastructures (Project No. LM2018096). We acknowledge the support of the LNCMI-CNRS in Grenoble, a member of the European Magnetic Field Laboratory (EMFL) . This work was also supported by the Ministry of Education,Youth and Sports from the Large Infrastructures for Research, Experimental Development and Innovations project “IT4 Innovations National Supercomputing Center - LM2015070” and by the OP VVV project MATFUN (Grant No. CZ.02.1.01/0.0/0.0/15_003/0000487).
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics