Hydrodynamic theory of thermoelectric transport and negative magnetoresistance in Weyl semimetals
Citation
Lucas, Andrew, Richard A. Davison, and Subir Sachdev. 2016. “Hydrodynamic Theory of Thermoelectric Transport and Negative Magnetoresistance in Weyl Semimetals.” Proc Natl Acad Sci USA 113 (34) (August 10): 9463–9468. doi:10.1073/pnas.1608881113.Abstract
We present a theory of thermoelectric transport in weakly disordered Weyl semimetals where the electron-electron scattering time is faster than the electron-impurity scattering time. Our hydrodynamic theory consists of relativistic fluids at each Weyl node, coupled together by perturbatively small inter-valley scattering, and long-range Coulomb interactions. The conductivity matrix of our theory is Onsager reciprocal and positive-semidefinite. In addition to the usual axial anomaly, we account for the effects of a distinct, axial-gravitational anomaly expected to be present in Weyl semimetals. Negative thermal magnetoresistance is a sharp, experimentally accessible signature of this axial-gravitational anomaly, even beyond the hydrodynamic limit.Other Sources
https://arxiv.org/abs/1604.08598Terms of Use
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