Quantum Oscillation Signatures of Pressure-induced Topological Phase Transition in BiTeI
Scientific Reports, ISSN: 2045-2322, Vol: 5, Issue: 1, Page: 15973
2015
- 24Citations
- 35Captures
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Metrics Details
- Citations24
- Citation Indexes24
- CrossRef24
- 23
- Captures35
- Readers35
- 35
Article Description
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 ∼ 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.
Bibliographic Details
Springer Science and Business Media LLC
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