Fluctuation-driven insulator-to-metal transition in an external magnetic field

  title={Fluctuation-driven insulator-to-metal transition in an external magnetic field},
  author={V{\'a}clav Jani{\vs} and Gerd Czycholl},
  journal={Physical Review B},
Institut fu¨r Theoretische Physik, Universit¨at Bremen, PO Box 330440, D-28334 Bremen, Germany(February 1, 2008)We consider a model for a metal-insulator transition of correlated electrons in an external magneticfield. We find a broad region in interaction and magnetic field where metallic and insulating (fullymagnetized) solutions coexist and the system undergoes a first-order metal-insulator transition. Aglobal instability of the magnetically saturated solution precedes the local ones and is… 
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