Effect of short-range electron correlations in dynamic transport in a Luttinger liquid

Article

关键词: DIMENSIONAL QUANTUM FLUIDS;    COULOMB INTERACTION;    CONDUCTANCE;    WIRES;    GAS;   

DOI  :  10.1103/PhysRevB.61.12766

来源: SCIE

【 摘 要 】

The density operator in the Luttinger model consists of two components, one of which describes long-wave fluctuations and the other is related to the rapid oscillations of charge-density-wave (CDW) type, caused by short-range electron correlations. It is commonly believed, that the conductance is determined by the longwave component. The CDW component is considered only when an impurity is present. We investigate the contribution of this component to the dynamic density response of a Luttinger liquid free from impurities. The conventional form of the CDW density operator is shown not to conserve the number of particles in the system. We propose the corrected CDW density operator devoid of this shortcoming and calculate the dissipative conductance in the case when the one-dimensional conductor is locally disturbed by a conducting probe. The contribution of CDW component to conductance is found to dominate over that of the long-wave component in the low-frequency regime.

【 授权许可】

Free