The recent solution by Finkel'shtein of a model of two-dimensional interacting disordered electrons is reconsidered. The scaling equation requires a small modification, with the result that the conductivity remains finite down to zero temperature instead of going to infinity as envisaged by Finkel'shtein. Strong divergence in the spin susceptibility and a vanishing of the spin-diffusion constant are found at low temperatures. We also discuss the possibility that the spin fluctuation may lead to crossover to the high magnetic field or singlet-only universality classes, restoring the metal-insulator transition. © 1984 The American Physical Society.
Spin fluctuations in disordered interacting electrons / Castellani, C.; Di Castro, C.; Lee, P. A.; Ma, M.; Sorella, S.; Tabet, E.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 30:3(1984), pp. 1596-1598. [10.1103/PhysRevB.30.1596]
Spin fluctuations in disordered interacting electrons
Sorella, S.;
1984-01-01
Abstract
The recent solution by Finkel'shtein of a model of two-dimensional interacting disordered electrons is reconsidered. The scaling equation requires a small modification, with the result that the conductivity remains finite down to zero temperature instead of going to infinity as envisaged by Finkel'shtein. Strong divergence in the spin susceptibility and a vanishing of the spin-diffusion constant are found at low temperatures. We also discuss the possibility that the spin fluctuation may lead to crossover to the high magnetic field or singlet-only universality classes, restoring the metal-insulator transition. © 1984 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
