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Magnetoresistance and conductivity exponents of quench-condensed ultra-thin films of Bi

Gupta, Das K and Sambandamurthy, G and Chandrasekhar, N (2000) Magnetoresistance and conductivity exponents of quench-condensed ultra-thin films of Bi. In: Physica B: Condensed Matter, 284-28 (2). pp. 1976-1977.

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Abstract

We have studied the magnetoresistance (MR) and evolution of conductivity with thickness of quench-condensed bismuth films on substrates of various dielectric constants. Our results indicate a negative initial MR proportional to the square of the magnetic field. The conductance shows a power law kind of dependence on thickness, with an exponent close to 1.33, characteristic of a 2-D percolating system, only when the films are grown on a thin $(\sim 10 \AA)$ germanium underlayer but not otherwise.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Conductivity exponent;Magnetoresistance;Quench-condensed Bi films
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 07 Aug 2007
Last Modified: 19 Sep 2010 04:36
URI: http://eprints.iisc.ernet.in/id/eprint/10400

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