Spin and charge separation in a mesoscopic ring

Abstract

Abstract We propose a simple model, i.e., a magnetic impurity embedded in a mesoscopic ring, which can be used to detect the spin and charge separation in a one-dimensional interacting electron system by measuring the basic period of the persistent current produced by the Aharonov-Bohm flux threading the ring and the low temperature behavior of the impurity susceptibility. The former only depends upon a dimensionless coupling strength parameter g which characterizes the interaction among the charge collective excitation modes, while the latter is completely controlled by another parameter g , which characterizes the interaction among the spin collective excitation modes.