Signatures of spin in the nu=1/3 fractional quantum Hall effect

Article

关键词: COMPOSITE FERMIONS;    ACTIVATION-ENERGIES;    MAGNETIC-FIELDS;    EXCITATIONS;    POLARIZATION;    LOCALIZATION;    SKYRMIONS;    INTEGER;    SYSTEMS;    LEVEL;   

DOI  :  10.1103/PhysRevB.74.165325

来源: SCIE

【 摘 要 】

The activation gap Delta of the fractional quantum Hall state at constant filling nu=1/3 is measured in a wide range of perpendicular magnetic field B. Despite the full spin polarization of the incompressible ground state, we observe a sharp crossover between a low-field linear dependence of Delta on B and a Coulomblike square root behavior at large B. From the global gap reduction we get information about the mobility edges in the fractional quantum Hall regime.

【 授权许可】

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