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Unified bulk semiclassical theory for intrinsic thermal transport and magnetization currents | | Cong Xiao
; Qian Niu
; | | Date: |
11 Apr 2020 | | Abstract: | We reveal the unexpected role of the material inhomogeneity in unifying and
simplifying the formulation of the intrinsic thermal and electric transport as
well as magnetization currents. In particular, the inhomogeneity introduces the
extit{phase-space} Berry curvature, which affects the semiclassical
description of carriers in addition to the anomalous velocity, and notably,
allows a general and rapid access to thermal transport and magnetization
currents displaying the extit{momentum-space} Berry curvature physics. As a
result, this theory does not need to invoke the edge-current picture, the
thermodynamic approach to magnetizations or any mechanical counterpart of
statistical forces. By introducing a fictitious inhomogeneity, this theory
applies to homogeneous samples as well. Our work thus promotes the material
inhomogeneity to be a basic trick in the semiclassical transport theory. We
also include more general mechanical driving forces and establish the Mott
relation between the resulting transport thermal and electric currents, whereas
this relation for these two currents was previously only known when an electric
field is the driving force. | | Source: | arXiv, 2004.5482 | | Services: | Forum | Review | PDF | Favorites | |
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