Electron-phonon scattering in topological insulator thin films
We present a theoretical study of electron-phonon scattering effects in thin films made of a
strong topological insulator. The phonons are modeled 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 …
strong topological insulator. The phonons are modeled 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 …
We present a theoretical study of electron-phonon scattering effects in thin films made of a strong topological insulator. The phonons are modeled 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 and the quasiparticle decay rate 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 BiSe.
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