论文标题
费米表面嵌套材料的非局部光学电导率
Nonlocal optical conductivity of Fermi surface nesting materials
论文作者
论文摘要
我们研究了支撑电荷密度波或旋转密度波的费米表面嵌套材料的非局部光学电导率。非局部光学电导率包含电子流体中相关性的信息，标准光学探针无法访问这些信息。一半金属是由于掺杂电荷密度波而出现的，同样，自旋谷金属从掺杂旋转密度波出现。基于抛物线带的近似，我们发现Drude峰转移到较高的频率，并在非局部光学电导率中分裂为两个峰。我们将其归因于半金属或自旋谷半金属状态的两个费米速度。
We investigate the nonlocal optical conductivity of Fermi surface nesting materials which support charge density waves or spin density waves. The nonlocal optical conductivity contains information of correlations in electron fluids which could not be accessed by standard optical probes. Half metal emerges from doping a charge density wave and similarly spin-valley half metal emerges from doping a spin density wave. Based on the parabolic band approximation, we find the Drude peak is shifted to higher frequency and splits into two peaks in the nonlocal optical conductivity. We attribute this to the two Fermi velocities in the half-metal or spin-valley half metal states.
