Evolution of the Fermi surface of BiTeCl with pressure

Journal of Physics. Condensed Matter : an Institute of Physics Journal
D VanGennepJ J Hamlin

Abstract

We report measurements of Shubnikov-de Haas oscillations in the giant Rashba semiconductor BiTeCl under applied pressures up to  ∼2.5 GPa. We observe two distinct oscillation frequencies, corresponding to the Rashba-split inner and outer Fermi surfaces. BiTeCl has a conduction band bottom that is split into two sub-bands due to the strong Rashba coupling, resulting in two spin-polarized conduction bands as well as a Dirac point. Our results suggest that the chemical potential lies above this Dirac point, giving rise to two Fermi surfaces. We use a simple two-band model to understand the pressure dependence of our sample parameters. Comparing our results on BiTeCl to previous results on BiTeI, we observe similar trends in both the chemical potential and the Rashba splitting with pressure.

References

Dec 3, 2008·The Review of Scientific Instruments·Keizo MurataShoji Aoyama
Jun 21, 2011·Nature Materials·K IshizakaY Tokura
Oct 29, 2013·Physical Review Letters·Xiaoxiang XiG L Carr
Dec 21, 2013·Science·H MurakawaY Tokura
Aug 5, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·D VanGennepJ J Hamlin
Aug 28, 2015·Physical Chemistry Chemical Physics : PCCP·Nicolai BorkHanna Vehkamäki
May 18, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·D VanGennepJ J Hamlin

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Citations

May 18, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·D VanGennepJ J Hamlin
Apr 4, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Xin GuiWeiwei Xie

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