手征费米液体理论的一般形式
Theory of a chiral Fermi liquid: general formalism
摘要：
我们扩展费米液体（FL）理论，包括自旋轨道（SO）分裂的能带，专注于Rashba SO耦合作为一个例子。我们构造了这样一个系统的对称性参数的唯象朗道相互作用函数，并通过显式微扰计算验证了这一构造。朗道函数被用来获得的有效质量，压缩性和稳定性条件的FL。它表明，虽然电荷扇区的性质，如有效质量和压缩性，是由明确定义的准粒子，自旋扇区的性质，如自旋磁化率，包含的贡献，从阻尼态之间的自旋分裂费米面，因此，除了弱SO耦合的情况之外，不能完全用FL理论描述。我们推导出一些具体的性质的手性FL和显示，特别是，接触相互作用自旋分裂的费米速度的Rashba子带发生，因为科恩异常，也修改了SO耦合。
英文摘要：
We extend the Fermi-liquid (FL) theory to include spin-orbit (SO) splitting of the energy bands, focusing on the Rashba SO coupling as an example. We construct the phenomenological Landau interaction function for such a system using the symmetry arguments and verify this construction by an explicit perturbative calculation. The Landau function is used to obtain the effective mass, compressibility, and stability conditions of the FL. It is shown that although the charge-sector properties, such as the effective mass and compressibility, are determined solely by well-defined quasiparticles, the spin-sector properties, such as the spin susceptibility, contain a contribution from damped states in between the spin-split Fermi surfaces, and thus cannot be fully described by the FL theory, except for the case of weak SO coupling. We derive some specific properties of a chiral FL and show, in particular, that for contact interaction spin-splitting of the Fermi velocities of Rashba subbands occurs because of the Kohn anomaly, also modified by SO coupling.
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