Spin and the Coulomb gap in the half-filled lowest Landau level

Article

关键词: 2-DIMENSIONAL ELECTRON-SYSTEMS;    STRONG MAGNETIC-FIELD;    DENSITY-OF-STATES;    COMPOSITE FERMIONS;    POLARIZATION;    ENERGY;    EXCITON;    REGIME;    NU=1/2;    FLUIDS;   

DOI  :  10.1103/PhysRevB.94.125409

来源: SCIE

【 摘 要 】

The Coulomb gap observed in tunneling between parallel two-dimensional electron systems, each at half-filling of the lowest Landau level, is found to depend sensitively on the presence of an in-plane magnetic field. Especially at low electron density, the width of the Coulomb gap at first increases sharply with in-plane field, but then abruptly levels off. This behavior appears to coincide with the known transition from partial to complete spin polarization of the half-filled lowest Landau level. The tunneling gap therefore opens a window onto the spin configuration of two-dimensional electron systems at high magnetic field.

【 授权许可】

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