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Quantum Oscillation Signatures of Pressure-induced Topological Phase Transition in BiTeI

Title
Quantum Oscillation Signatures of Pressure-induced Topological Phase Transition in BiTeI
Authors
Park, JoonbumJin, Kyung-HwanJo, Y. J.Choi, E. S.Kang, W.Kampert, E.Rhyee, J. -S.Jhi, Seung-HoonKim, Jun Sung
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2015
Journal Title
SCIENTIFIC REPORTS
ISSN
2045-2322JCR Link
Citation
vol. 5
Publisher
NATURE PUBLISHING GROUP
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report the pressure-induced topological quantum phase transition of BiTeI single crystals using Shubnikov-de Haas oscillations of bulk Fermi surfaces. The sizes of the inner and the outer FSs of the Rashba-split bands exhibit opposite pressure dependence up to P=3.35 GPa, indicating pressure-tunable Rashba effect. Above a critical pressure P similar to 2 GPa, the Shubnikov-de Haas frequency for the inner Fermi surface increases unusually with pressure, and the Shubnikov-de Haas oscillations for the outer Fermi surface shows an abrupt phase shift. In comparison with band structure calculations, we find that these unusual behaviors originate from the Fermi surface shape change due to pressure-induced band inversion. These results clearly demonstrate that the topological quantum phase transition is intimately tied to the shape of bulk Fermi surfaces enclosing the time-reversal invariant momenta with band inversion.
DOI
10.1038/srep15973
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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