Localizations in coupled electronic chains

Details Localizations in coupled electronic chains Localizations in coupled electronic chains

1998-10-06

arxiv.org/abs/cond-mat/9810045v1

Physics

Condensed Matter

Strongly Correlated Electrons

no figure, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.58.12699

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 non-interacting 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.

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