Localizations in coupled electronic chains

Article

关键词: 2-CHAIN HUBBARD-MODEL;    SIZE SCALING APPROACH;    PERSISTENT CURRENTS;    ANDERSON LOCALIZATION;    QUANTUM WIRES;    RINGS;    DIAGONALIZATION;    IMPURITIES;    DISORDER;    PHASES;   

DOI  :  10.1103/PhysRevB.58.12699

来源: SCIE

【 摘 要 】

We studied effects of random potentials and roles of electron-electron interactions in the gapless phase of coupled Hubbard chains, using a renormalization group technique. For noninteracting electrons, we obtained the localization length proportional to the number of chains, as already shown in the other approaches. For interacting electrons, the localization length is longer for stronger interactions, that is, the interactions counteract the random potentials. Accordingly, the localization length is not a simple linear function of the number of chains. This interaction effect is strongest when there is only a single chain. We also calculate the effects of interactions and random potentials on charge stiffness. [S0163-1829(98)05143-1].

【 授权许可】

Free