1208.5523 (C. Martin et al.)

Disentangling the surface and bulk electronic states of the Rashba
spin-splitting BiTeI    [PDF]

C. Martin, H. Berger, D. B. Tanner

We report the observation of Shubnikov-de Haas (SdH) oscillations in single crystals of the Rashba spin-splitting compound BiTeI, from both longitudinal ($R_{xx}$(B)) and Hall ($R_{xy}$(B)) magnetoresistance. Under magnetic field up to 18 T, we found only one frequency F = 281$\pm$ 7 T, corresponding to a Fermi momentum $k_{F}\approx 0.1\AA^{-1}$. Angle dependent study strongly suggests that oscillations originate from surface carriers. Combining SdH effect and optical spectroscopy, we demonstrates the existence of two distinct electronic systems: a surface, highly two-dimensional one that give rise to quantum oscillations at lower magnetic field and a second bulk system, that dominates the optical and transport properties.

View original: http://arxiv.org/abs/1208.5523