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】

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