Insulator-quantum Hall transition in antidot lattices

Article

关键词: TWO-DIMENSIONAL SYSTEM;    STRONG MAGNETIC-FIELDS;    GLOBAL PHASE-DIAGRAM;    2 DIMENSIONS;    ELECTRON LOCALIZATION;    SCALING THEORY;    CONDUCTANCE;    QUANTIZATION;    SYMMETRY;    ARRAYS;   

DOI  :  10.1103/PhysRevB.65.035322

来源: SCIE

【 摘 要 】

Localization in antidot lattices subjected to a magnetic field is numerically studied. Oscillations of the localization length with periods of Phi(0)/2 and Phi(0), where Phi(0) is a flux quantum h/e, as a function of flux passing through a unit cell are obtained and an insulator-quantum Hall transition point where the Fermi level crosses extended states is identified. It is revealed that extended states float up in energy and disappear at a critical magnetic field. The results are in good agreement with recent experiments.

【 授权许可】

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