Infrared studies of the onset of conductivity in ultrathin pb films

P. F. Henning; C. C. Homes; S. Maslov; G. L. Carr; D. N. Basov; B. Nikolic; M. Strongin

doi:10.1103/PhysRevLett.83.4880

Infrared studies of the onset of conductivity in ultrathin pb films

P. F. Henning, C. C. Homes, S. Maslov, G. L. Carr, D. N. Basov, B. Nikolic, M. Strongin

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Abstract

In this paper we report the first experimental measurement of the low-temperature, normal-state infrared conductivity of ultrathin quenched-condensed Pb films. For dc sheet resistances such that ωt ≪ 1 the ac conductance increases with frequency but is in disagreement with the predictions of weak localization. We attribute this behavior to the effects of an inhomogeneous granular structure in these films when they are first formed, which is manifested at the very small probing scale of infrared measurements. Our data are consistent with predictions of two-dimensional percolation theory. 1999

Original language	English (US)
Pages (from-to)	4880-4883
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.83.4880
State	Published - Jan 1 1999
Externally published	Yes

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General Physics and Astronomy

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AU - Basov, D. N.

AU - Nikolic, B.

AU - Strongin, M.

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AB - In this paper we report the first experimental measurement of the low-temperature, normal-state infrared conductivity of ultrathin quenched-condensed Pb films. For dc sheet resistances such that ωt ≪ 1 the ac conductance increases with frequency but is in disagreement with the predictions of weak localization. We attribute this behavior to the effects of an inhomogeneous granular structure in these films when they are first formed, which is manifested at the very small probing scale of infrared measurements. Our data are consistent with predictions of two-dimensional percolation theory. 1999

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Infrared studies of the onset of conductivity in ultrathin pb films

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