Issue |
Europhys. Lett.
Volume 50, Number 6, June II 2000
|
|
---|---|---|
Page(s) | 776 - 781 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2000-00548-y | |
Published online | 01 September 2002 |
Two-dimensional metal-insulator transition in smooth random magnetic fields
Texas Center for Superconductivity, University of Houston Houston, TX 77204-5506, USA
Received:
28
July
1999
Accepted:
14
April
2000
We re-examine the delocalization problem of two-dimensional electrons in
the presence of random magnetic fields. By introducing short-range 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 . Interesting connections of
this system with the recently observed B=0 two-dimensional metallic phase
(Kravchenko et al., Phys. Rev. B, 50 (1994) 8039) are also
discussed.
PACS: 71.30.+h – Metal-insulator transitions and other electronic transitions / 73.20.Fz – Weak or Anderson localization / 73.20.Jc – Delocalization processes
© EDP Sciences, 2000
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