Fluctuation-driven insulator-to-metal transition in an external magnetic field
arXiv:cond-mat/9908241 · doi:10.1103/PhysRevB.61.9875
Abstract
We consider a model for a metal-insulator transition of correlated electrons in an external magnetic field. We find a broad region in interaction and magnetic field where metallic and insulating (fully magnetized) solutions coexist and the system undergoes a first-order metal-insulator transition. A global instability of the magnetically saturated solution precedes the local ones and is caused by collective fluctuations due to poles in electron-hole vertex functions.
REVTeX 4 pages, 3 PS figures