Impurity effects and spin polarizations in a narrow quantum Hall system

Article

关键词: TILTED MAGNETIC-FIELDS;    FILLED LANDAU-LEVEL;    ANTIDOT ARRAYS;    GROUND-STATE;    EXCITATIONS;    NU=1;    MAGNETOTRANSPORT;    QUASIPARTICLE;    ELECTRONS;    CHANNELS;   

DOI  :  10.1103/PhysRevB.58.9890

来源: SCIE

【 摘 要 】

The temperature dependence of electron-spin polarization for a narrow quantum Hall system shows behavior analogous to that of a two-dimensional system at major filling factors. At the lowest half-filled quantum Wall state for which no two-dimensional analog exists, we find a stable spin partially polarized system. Periodic Gaussian repulsive impurities (antidots) in such a system lead to unique spin transitions at nu = 1/3 and nu = 1/2 and the pair-correlation functions provide clues about the nature of different ground states in the system. These results can be explored in optical spectroscopy and optically pumped NMR Knight-shift measurements. [S0163-1829(98)02436-9].

【 授权许可】

Free