Tuesday, August 6, 2013

1305.2272 (Maxim Breitkreiz et al.)

Transport anomalies due to anisotropic interband scattering    [PDF]

Maxim Breitkreiz, P. M. R. Brydon, Carsten Timm
Unexpected transport behavior can arise due to anisotropic single-particle scattering in multiband systems. Specifically, we show within a semiclassical Boltzmann approach beyond the relaxation-time approximation that anisotropic scattering between electronlike and holelike Fermi surfaces generically leads to negative transport times, which in turn cause negative magnetoresistance, an extremum in the Hall coefficient, and a reduction of the resistivity. The anisotropy required for this to occur decreases with increasing mismatch between the Fermi-surface radii.
View original: http://arxiv.org/abs/1305.2272

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