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Magnetic Moment Oscillations in a Quantum Hall Ring | | Lachezar S. Georgiev
; Michael R. Geller
; | | Date: |
28 Apr 2004 | | Journal: | Phys. Rev. B 70, 155304 (2004) DOI: 10.1103/PhysRevB.70.155304 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | We predict non-mesoscopic 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 $a R e omega_{
m c} /c$, where $omega_{
m c}$ is the cyclotron frequency. | | Source: | arXiv, cond-mat/0404681 | | Services: | Forum | Review | PDF | Favorites | |
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