Magnetic field driven metal-insulator phase transition in planar systems

E. V. Gorbar, V. P. Gusynin, V. A. Miransky, Igor Shovkovy

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Abstract

A theory of the magnetic field driven (semi)metal-insulator phase transition is developed for planar systems with a low density of carriers and a linear (i.e., relativisticlike) dispersion relation for low-energy quasiparticles. The general structure of the phase diagram of the theory with respect to the coupling constant, the chemical potential, and the temperature is derived in two cases, with and without an external magnetic field. The conductivity and resistivity as functions of temperature and magnetic field are studied in detail. An exact relation for the value of the "offset" magnetic field Bc, determining the threshold for the realization of the phase transition at zero temperature, is established. The theory is applied to the description of a recently observed phase transition induced by a magnetic field in highly oriented pyrolytic graphite.

Original languageEnglish (US)
Article number045108
Pages (from-to)451081-4510822
Number of pages4059742
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number4
Publication statusPublished - Jul 15 2002
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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