Precise determination of two-carrier transport properties in the topological insulator TlBiSe2
Abstract
We report the electric transport study of the three-dimensional topological insulator TlBiSe2. We applied a newly developed analysis procedure and precisely determined two-carrier transport properties. Magnetotransport properties revealed a multicarrier conduction of high- and low-mobility electrons in the bulk, which was in qualitative agreement with angle-resolved photoemission results~[K. Kuroda et~al., Phys. Rev. Lett. 105, 146801 (2010)]. The temperature dependence of the Hall mobility was explained well with the conventional Bloch-Gr\"uneisen formula and yielded the Debye temperature D=113 14~K. The results indicate that the scattering of bulk electrons is dominated by acoustic phonons.
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