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

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

1999-08-17

arxiv.org/abs/cond-mat/9908241v1

Phys. Rev. B61, 9875 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

REVTeX 4 pages, 3 PS figures

Scientific paper

10.1103/PhysRevB.61.9875

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.

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