Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings

Details Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings

2002-04-09

arxiv.org/abs/cond-mat/0204212v2

Europhys. Lett., 60(1), pp. 120-126 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 2 figures, LaTeX, using epl.cls (included), considerably revised final version

Scientific paper

10.1209/epl/i2002-00328-9

We show that disorder increases the persistent current of a half-filled
one-dimensional Hubbard-Anderson ring at strong interaction. This unexpected
effect results from a perturbative expansion starting from the strongly
interacting Mott insulator ground state. The analytical result is confirmed and
extended by numerical calculations.

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