Semiclassical dynamics and nonlinear charge current
Yang Gao
Front. Phys. ›› 2019, Vol. 14 ›› Issue (3) : 33404
Semiclassical dynamics and nonlinear charge current
Electron conductivity is an important material property that can provide a wealth of information about the underlying system. Especially, the response of the conductivity with respect to electromagnetic fields corresponds to various nonlinear charge currents, which have distinct symmetry requirements and hence can be used as efficient probes of different systems. To help the band-structure engineering of such nonlinear currents, a universal treatment of electron dynamics up to second order expressed in the basis of the unperturbed states are highly useful. In this work, we review the general semiclassical framework of the nonlinear charge currents.
nonlinear charge current / nonlinear electron dynamics / nonlinear anomalous Hall effect / linear magnetoresistance / negative longitudinal magnetoresistance / Berry curvature / quantum metric / positional shift
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The highest order of τ is the same as the highest order of the field, which is the property of the asymptotic solution to the Boltzmann equation, as implied in Eq. (64). |
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In Ref. [67], it is found that except the energy polarization contribution, all the other terms are consistent. For the energy polarization contribution, Ref. [41] contains a typo. When inserting the second order energy in Eq. (42), the energy polarization in Ref. [41] has an additional 1/4 factor by mistake. After removing such factor as given in Eq. (43), the energy polarization has the same expression with Eq. (2.31) in Ref. [67]. |
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