摘要
We investigate the nonlocal optical conductivity of Fermi surface nesting materials that support charge density waves(CDWs)or spin density waves(SDWs).The nonlocal optical conductivity contains information on correlations in electron fluids,which could not be accessed by standard optical probes.A half-metal emerges from doping a CDW,and similarly,a spin-valley halfmetal emerges from doping an SDW.Based on the parabolic band approximation,we find that the Drude peak is shifted to a 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.
基金
supported by the ISSP International Collaboration Program of the University of Tokyo
the support of a JSPS Foreign Postdoctoral Fellowship(Grant Nos.PE14052,P16027)
the Chinese Academy of Sciences funding(Grant Nos.E1Z1D10200,and E2Z2D10200)
supported by the National Natural Science Foundation of China(Grant No.61988102)
the Key Research and Development Program of Guangdong Province(Grant No.2019B090917007)
the Science and Technology Planning Project of Guangdong Province(Grant No.2019B090909011)
the ZJ project(Grant No.2021QN02X159)。
