PERSISTENT CURRENTS IN A QUANTUM RING - EFFECTS OF IMPURITIES AND INTERACTIONS

被引：59

作者：

CHAKRABORTY, T

PIETILAINEN, P

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH, D-70569 STUTTGART, GERMANY

[2] UNIV OULU, DEPT THEORET PHYS, SF-90570 OULU, FINLAND

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.52.1932

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the persistent current in a quantum ring in the presence of a Gaussian impurity and/or with Coulomb interactions included. The impurity potential mixes the states, lifts the degeneracies in the energy spectrum, and reduces the persistent current from its impurity-free value. The role of interactions in the absence or presence of an impurity was found to be insignificant. We also present the results for the charge density of the system in the presence of the impurity with or without the Coulomb interactions.

引用

页码：1932 / 1935

页数：4

共 29 条

[1] PERSISTENT CURRENTS IN AN INTERACTING 1D DISORDERED RING - MANIFESTATIONS OF THE MOTT-HUBBARD TRANSITION [J].