标题： 费米面嵌套材料的非局部光学电导率 显示英文标题

标题： Nonlocal optical conductivity of Fermi surface nesting materials

摘要： 我们研究了支持电荷密度波或自旋密度波的费米面嵌套材料的非局域光学电导率。 非局域光学电导率包含电子流体中无法通过标准光学探测器获取的相关信息。 半金属通过掺杂电荷密度波产生，同样地，自旋-谷半金属通过掺杂自旋密度波产生。 基于抛物带近似，我们发现非局域光学电导率中的德鲁德峰向更高频率移动并分裂为两个峰。 我们将此归因于半金属或自旋-谷半金属态中的两个费米速度。 显示英文摘要

摘要： 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.