Interaction-induced magnetoresistance: From the diffusive to the ballistic regime

Details Interaction-induced magnetoresistance: From the diffusive to the ballistic regime Interaction-induced magnetoresistance: From the diffusive to the ballistic regime

2002-07-23

arxiv.org/abs/cond-mat/0207557v2

Phys. Rev. Lett., 90 (2003) 076801

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.90.076801

We study interaction-induced quantum correction to the conductivity tensor of electrons in two dimensions for arbitrary T tau, where T is the temperature and tau the transport mean free time. A general formula is derived, expressing the correction in terms of classical propagators ("ballistic diffusons"). The formalism is used to calculate the interaction contribution to the magnetoresistance in a classically strong transverse field and smooth disorder in the whole range of temperatures from the diffusive (T tau<<1) to the ballistic (T tau>1) regime.

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