Europhys. Lett.
Volume 69, Number 3, February 2005
Page(s) 442 - 446
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 24 December 2004
Europhys. Lett., 69 (3), pp. 442-446 (2005)
DOI: 10.1209/epl/i2004-10349-4

Forced localization in thin $\chem{K}$ films, investigated with the superconducting proximity effect

M. Zhang and G. Bergmann

Physics Department, University of Southern California Los Angeles, CA 90089-0484, USA

received 26 May 2004; accepted in final form 17 November 2004
published online 24 December 2004

Thin films of alkali metals are forced into an insulating state by being covered with sub-mono-layers of $\chem{Pb}$. The superconducting proximity effect is used to investigate the electronic change in the alkali film. On the length scale of the film thickness the electronic properties of the alkali film do not change noticeably during the metal-insulator transition.

74.45.+c - Proximity effects; Andreev effect; SN and SNS junctions.
73.20.Fz - Weak or Anderson localization.
71.20.Dg - Alkali and alkaline earth metals.

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