期刊论文详细信息
Magnetic-moment oscillations in a quantum Hall ring | |
Article | |
关键词: 2-DIMENSIONAL ELECTRON-GAS; PERSISTENT CURRENT; CURRENTS; SYSTEMS; DOTS; SUSCEPTIBILITY; | |
DOI : 10.1103/PhysRevB.70.155304 | |
来源: SCIE |
【 摘 要 】
We predict nonmesoscopic oscillations in the orbital magnetic moment of a thin semiconductor ring in the quantum Hall effect regime. These oscillations, which occur as a function of magnetic field because of a competition between paramagnetic and diamagnetic currents in the ring, are a direct probe of the equilibrium current distribution in the nonuniform quantum Hall fluid. The amplitude of the oscillating moment in a thin ring with major radius R and minor radius (half-width) a is approximately aReomega(c)/c, where omega(c) is the cyclotron frequency.
【 授权许可】
Free