Metal-insulator transition in spatially-correlated random magnetic field system

Details Metal-insulator transition in spatially-correlated random magnetic field system Metal-insulator transition in spatially-correlated random magnetic field system

1999-01-04

arxiv.org/abs/cond-mat/9901019v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, LaTeX, 4 PS figures

Scientific paper

We reexamine the problem of delocalization of two-dimensional electrons in the presence of random magnetic field. By introducing spatial correlations among random fluxes, a well-defined metal-insulator transition characterized by a two-branch scaling of conductance has been demonstrated numerically. Critical conductance is found non-universal with a value around $e^2/h$. Interesting connections of this system with the recently observed B=0 two-dimensional metallic phase (Kravchenko et al., Phys. Rev. B {\bf 50}, 8039 (1994)) are also discussed.

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