Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals

Details Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals

2006-10-12

arxiv.org/abs/cond-mat/0610344v2

Phys. Rev. B 75, 024208 (2007)

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 5 figures. Appendix A revised, notes added

Scientific paper

10.1103/PhysRevB.75.024208

The electron-electron interaction corrections to the transport coefficients are calculated for a two-dimensional disordered metal in a parallel magnetic field via the quantum kinetic equation approach. For the thermal transport, three regimes (diffusive, quasiballistic and truly ballistic) can be identified as the temperature increases. For the diffusive and quasiballistic regimes, the Lorentz number dependence on the temperature and on the magnetic field is studied. The electron-electron interactions induce deviations from the Wiedemann-Franz law, whose sign depend on the temperature: at low temperatures the long-range part of the Coulomb interaction gives a positive correction, while at higher temperature the inelastic collisions dominate the negative correction. By applying a parallel field, the Lorentz number becomes a non-monotonic function of field and temperature for all values of the Fermi-liquid interaction parameter in the diffusive regime, while in the quasiballistic case this is true only sufficiently far from the Stoner instability.

Affiliated with

Also associated with

No associations

Rating

Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interaction corrections: temperature and parallel field dependencies of the Lorentz number in two-dimensional disordered metals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-442727