Magnonic thermal transport using the quantum Boltzmann equation
Magnonic thermal transport using the quantum Boltzmann equation
复制标题
使用量子玻尔兹曼方程的磁热传输
DOI:
10.1103/physrevb.104.064408
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发表时间:
2021
影响因子:
3.7
通讯作者:
Ohnuma Yuichi
中科院分区:
文献类型:
--
作者:
Nakata Kouki;Ohnuma Yuichi
We present a formula for thermal transport in the bulk of Bose systems based on the quantum Boltzmann equation (QBE). First, starting from the quantum kinetic equation and using the Born approximation for impurity scattering, we derive the QBE of Bose systems and provide a formula for thermal transport subjected to a temperature gradient. Next, we apply the formula to magnons. Assuming a relaxation time approximation and focusing on the linear response regime, we show that the longitudinal thermal conductivity of the QBE exhibits the different behavior from the conventional Boltzmann equation. The thermal conductivity of the QBE reduces to the Drude type in the limit of the quasiparticle approximation, while not in the absence of the approximation. Finally, applying the quasiparticle approximation to the QBE, we find that the correction to the conventional Boltzmann equation is integrated as the self-energy into the spectral function of the QBE, and this enhances the thermal conductivity. Thus, we shed light on the thermal transport property of the QBE beyond the conventional.
DOI:
10.1016/0370-1573(83)90051-0
发表时间:
1983
期刊:
Physics Reports
影响因子:
--
作者:
J. Serene;D. Rainer
通讯作者:
D. Rainer
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1088/0370-1328/91/1/316
发表时间:
1967
期刊:
影响因子:
--
作者:
S. Doniach
通讯作者:
S. Doniach