液^3He中准粒子通过涡旋与固体表面之间的动量输运

MOMENTUM TRANSFER BETWEEN 3He QUASIPARTICLES AND THE SOLID SURFACE VIA VORTICES

本文对于与稀薄液~3He-~4He溶液相接触的振动固体表面的横声阻抗作了探讨。提出在液~3He与基片之间有一准二维的超流液~4He层的“三明治”模型,根据传输线理论得到表面阻抗与液~3He的协强张量、超流~4He层动量变化之间的关系式,推导出在“三明治”结构下量子涡旋的运动方程,并考虑涡旋运动与滑动边界条件计算了液~3He中准粒子与固体表面之间的动量输运。从而由理论上计算出横声阻抗的实部与虚部,并与Ritchie等人的实验结果作了比较。

In this paper, a model of 3He liquid layer on an oscillating substrate with a thin super-fluid 4He film as a boundary layer is considered. The complex surface impedance is calculated using the transmission line theory. The slip boundary condition and the vortex motion are taken into account to compute the momentum exchange between 3He and the solid surface. The calculated values are compared with experiments.