Simulation of Sliding Motion of Charge-Density-Wave by Considering Dipole and Screening Effects

抄録

Long-length scale interaction model proposed by Littlewood has been extended to study dipole and screening effects on sliding motion of one-dimensional charge-density-wave (CDW). The system in the extended model consists of a site-by-site main-system fixed at pinning centers and the continuous sub-systems in each pinning site. For strong pinning case, we have demonstrated these effects on the CDW phase, CDW current, and narrow band noise spectrum. The dipole effect suppresses the pinning potential and gives rise to a change from deformable “plastic flow” like to rigid “moving solid” like CDW condenstates, while the screening effect acts to recover the former.