Viscosity of a two-dimensional Fermi liquid
Viscosity of a two-dimensional Fermi liquid
复制标题
二维费米液体的粘度
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
D. Novikov
中科院分区：
文献类型：
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作者：
D. Novikov
发现二维费米液体的剪切粘度是温度的非解析函数。与由前向散射过程决定的准粒子寿命相反，对粘度的主要贡献来自库珀通道中的准粒子散射。顶点部分的对数奇异性增强了粘度。这种奇异行为可以在二维电子传递和原子阱中费米子的动量弛豫中表现出来。
Shear viscosity of a two-dimensional Fermi liquid is found to be a nonanalytic function of temperature. In contrast to the quasiparticle lifetime that is determined by the forward-scattering processes, the main contribution to the viscosity arises from the quasiparticle scattering in the Cooper channel. The viscosity is enhanced by the logarithmic singularity of the vertex part. This singular behavior can manifest itself in the two-dimensional electron transport, and in the momentum relaxation of fermions in atomic traps.