Quantum kinetic theory of nonlinear thermal current
- URL: http://arxiv.org/abs/2211.01895v2
- Date: Wed, 12 Apr 2023 14:44:17 GMT
- Title: Quantum kinetic theory of nonlinear thermal current
- Authors: Harsh Varshney, Kamal Das, Pankaj Bhalla, and Amit Agarwal
- Abstract summary: We develop the quantum kinetic theory framework to describe thermal transport in presence of a temperature gradient.
We show that the intrinsic thermal current is determined by the band geometric quantities and is non-zero in systems where both the space inversion and time-reversal symmetries are broken.
- Score: 1.4174475093445236
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the second-order nonlinear electronic thermal transport
induced by temperature gradient. We develop the quantum kinetic theory
framework to describe thermal transport in presence of a temperature gradient.
Using this, we predict an intrinsic scattering time independent nonlinear
thermal current in addition to the known extrinsic nonlinear Drude and Berry
curvature dipole contributions. We show that the intrinsic thermal current is
determined by the band geometric quantities and is non-zero only in systems
where both the space inversion and time-reversal symmetries are broken. We
employ the developed theory to study the thermal response in tilted massive
Dirac systems. We show that besides the different scattering time dependence,
the various current contributions have distinct temperature dependence in the
low temperature limit. Our systematic and comprehensive theory for nonlinear
thermal transport paves the way for future theoretical and experimental studies
on intrinsic thermal responses.
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