论文标题
离子晶体的声子大厅的粘度
The phonon Hall viscosity of ionic crystals
论文作者
论文摘要
当打破时反转对称性时，声学晶格动力学的低能描述允许粘度张量的无耗散成分，声子霍尔粘度，该粘度捕获了声子手性如何随波形增长。在这项工作中，我们表明，在离子晶体中，洛伦茨力量在移动离子上产生了声子大厅的粘度贡献。我们使用简单的方格玩具模型来计算洛伦兹力对霍尔粘度的贡献的典型值，并将其与其他Hall-Viscosity机制的强度进行了比较。
When time-reversal symmetry is broken, the low-energy description of acoustic lattice dynamics allows for a dissipationless component of the viscosity tensor, the phonon Hall viscosity, which captures how phonon chirality grows with the wavevector. In this work, we show that, in ionic crystals, a phonon Hall viscosity contribution is produced by the Lorentz forces on moving ions. We calculate typical values of the Lorentz force contribution to the Hall viscosity using a simple square lattice toy model, and we compare it with literature estimates of the strengths of other Hall-viscosity mechanisms.
