arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.1219cond-mat.mes-hall
收藏

基于Green-Kubo公式的声子霍尔热导率

Phonon Hall thermal conductivity from Green-Kubo formula

Jian-Sheng Wang, Lifa Zhang

摘要:

导出了弹道声子霍尔模型的热导张量公式。研究发现,尽管电导率张量的对角元发散到无穷大,但非对角元在磁场中是有限的、反对称的、奇的。非对角元素只有在声子系统的动力学矩阵打破镜面反射对称性时才为非零。结果是在没有自旋-声子相互作用微扰假设的情况下得到的。

英文摘要:

We derive a formula for the thermal conductivity tensor of a ballistic phonon Hall model. It is found that, although the diagonal elements of the conductivity tensor diverge to infinite, the off-diagonal elements are finite,antisymmetric, and odd in magnetic field. The off-diagonal elements are non-zero only if the dynamic matrix of the phonon system breaks mirror reflection symmetry. The results are obtained without perturbative assumptions about the spin-phonon interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑