Persistent currents in mesoscopic rings and boundary conformal field theory

Abstract

A tight-binding model of electron dynamics in mesoscopic normal rings is studied using boundary conformal field theory. The partition function is calculated in the low energy limit and the persistent current generated as a function of an external magnetic flux threading the ring is found. We study the cases where there are defects and electron-electron interactions separately. The same temperature scaling for the persistent current is found in each case, and the functional form can be fitted, with a high degree of accuracy, to experimental data.

6 pages, 4 enclosed postscript figures

References in corpus (5)

• Boundary conformal field theory approach to the two-dimensional critical Ising model with a defect line
• Persistent Currents in 1D Disordered Rings of Interacting Electrons
• A Simple Formula for the Persistent Current in Disordered 1D Rings: Parity and Interaction Effects
• Supercurrent States in 1D Finite-Size Rings
• Persistent currents in mesoscopic rings and conformal invariance

Cited by in corpus (2)

• Persistent currents in mesoscopic rings: A numerical and renormalization group study
• The large system asymptotics of persistent currents in mesoscopic quantum rings