论文标题
自旋轨耦合电子气体的电子电子散射和传输特性
Electron-electron scattering and transport properties of spin-orbit coupled electron gas
论文作者
论文摘要
我们计算具有强旋转的二维电子气体的电导率和热导率 - 轨道耦合，其中散射以电子为主导 - 电子 - 电子碰撞。尽管该系统中显然没有伽利略的不变性，但两粒子散射并不影响填充两个螺旋带的带串联上方的电导率。在带有一个螺旋带为空的频带交叉点下方，打开电子 - 电子散射仅导致电导率的有限降低，因此其高温值与散射强度无关。与此相比，热导率不受旋转轨道耦合的强烈影响，并且随着费米水平穿过带跨点的扭结。
We calculate the electrical and thermal conductivity of a two-dimensional electron gas with strong spin--orbit coupling in which the scattering is dominated by electron--electron collisions. Despite the apparent absence of Galilean invariance in the system, the two-particle scattering does not affect the electrical conductivity above the band-crossing point where both helicity bands are filled. Below the band-crossing point where one helicity band is empty, switching on the electron--electron scattering leads only to a limited decrease of the electrical conductivity, so that its high-temperature value is independent of the scattering intensity. In contrast to this, thermal conductivity is not strongly affected by the spin-orbit coupling and exhibits only a kink as the Fermi level passes through the band-crossing point.
