The persistent current in disordered rings

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Abstract

We have calculated the persistent current on small quantum rings taking into account electron-electron interaction and disorder. With the Coulomb interaction two regimes may arise where the suppression of the current by disorder is much smaller than for the case of free electrons. The first regime is the Luttinger liquid and the other one is associated with the fractional 1/N effect [F.V. Kusmartsev, JETP Lett. 60 (1994) 649].In both cases the main reason preventing the suppression of the persistent current by disorder is spin-charge separation.

Original languageBritish English
Pages (from-to)143-149
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume251
Issue number2
DOIs
StatePublished - 11 Jan 1999

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