Electron-phonon scattering in topological insulator thin films

2011/11/17 by Sébastien Giraud, Arijit Kundu, Reinhold Egger · 1 citation
Physics and Astronomy · #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.85.035441

published as Phys. Rev. B 85, 035441 (2012) · 11 pages, 6 figures

arxiv created 2011/11/17 · arxiv updated 2012/01/26

Abstract

We present a theoretical study of electron-phonon scattering effects in thin films made of a strong topological insulator. Phonons are modelled by isotropic elastic continuum theory with stress-free boundary conditions, and the interaction with the helical surface Dirac fermions is mediated by the deformation potential. We determine the temperature-dependent electrical resistivity ρ(T) and the quasiparticle decay rate Γ(T) observable in photoemission. The low- and high-temperature power laws for both quantities are obtained analytically. Detailed estimates covering the full temperature range are provided for Bi₂Se₃.

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