Berry连接和曲率
物理
非线性系统
热的
温度梯度
量子
热量子场论
散射
量子力学
量子引力
热力学
作者
Harsh Varshney,Kamal Das,Pankaj Bhalla,Amit Agarwal
出处
期刊:Physical review
日期:2023-06-20
卷期号:107 (23)
被引量:1
标识
DOI:10.1103/physrevb.107.235419
摘要
We investigate the second-order nonlinear electronic thermal transport induced by the temperature gradient. We develop the quantum kinetic theory framework to describe thermal transport in the 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 nonzero only in systems in which 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 dependencies, the various current contributions have distinct temperature dependencies 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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