Transport anomalies due to anisotropic interband scattering

Abstract

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.

6 pages, 6 figures, published version

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• Vertex corrections to the dc conductivity in anisotropic multiband systems
• Importance of Fermi Surface Topology for In-Plane Resistivity Anisotropy in Hole- and Electron-Doped Ba(Fe${}_{1-x}$TM${}_x$)${}_2$As${}_2$ (TM=Cr, Mn and Co)
• Magnetotransport of multiple-band nearly-antiferromagnetic metals due to "hot-spot" scattering
• Unconventional localization of electrons inside of a nematic electronic phase
• Correlation between non-Fermi-liquid behavior and superconductivity in (Ca, La)(Fe,Co)As2 iron arsenides: A high-pressure study
• Interband scattering- and nematicity-induced quantum oscillation frequency in FeSe
• The role of magnetic excitations in magnetoresistance and Hall effect of slightly TM-substituted BaFe${}_2$As${}_2$ compounds (TM = Mn, Cu, Ni)
• Magnetotransport studies of optimally doped Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Large negative transconductance in multilayer graphene: The role of intersubband scattering
• Interrupted orbital motion in density-wave systems