Avoided level crossing at the magnetic field induced topological phase transition due to spin-orbital mixing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10387102" target="_blank" >RIV/00216208:11320/18:10387102 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.98.161202" target="_blank" >https://doi.org/10.1103/PhysRevB.98.161202</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.98.161202" target="_blank" >10.1103/PhysRevB.98.161202</a>

Result language
angličtina
Original language name
Avoided level crossing at the magnetic field induced topological phase transition due to spin-orbital mixing
Original language description
In three-dimensional topological insulators, an effective closure of the bulk energy gap with increasing magnetic field expected at a critical point can yield a band crossing at a gapless Dirac node. Using high-field magneto-optical Landau-level spectroscopy on the topological crystalline insulator Pb1-xSnxSe, we demonstrate that such a gap closure does not occur, and an avoided crossing is observed as the magnetic field is swept through the critical field. We attribute this anticrossing to orbital parity and spin mixing of the N = 0 levels. Concurrently, we observe no gap closure at the topological phase transition versus temperature suggesting that both are due to a single, likely extrinsic, mechanism.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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