Currents in a system of noisy mesoscopic rings

Article

关键词: PERSISTENT CURRENTS;    METAL RINGS;    CYLINDERS;    FLUX;   

DOI  :  10.1103/PhysRevB.67.073305

来源: SCIE

【 摘 要 】

A semiphenomenological model is proposed to study magnetic fluxes and currents in mesoscopic rings at nonzero temperature. The model is based on a Langevin equation for a flux subject to thermal equilibrium Nyquist noise. Quenched randomness, which mimics disorder, is included via the fluctuating parameter method. It is shown that self-sustaining and persistent currents survive in the presence of Nyquist noise and quenched disorder but the stability threshold can be shifted by noise.

【 授权许可】

Free