Infrared studies of the onset of conductivity in ultrathin Pb films

被引：43

作者：

Henning, PF ^{[1
]}

Homes, CC

Maslov, S

Carr, GL

Basov, DN

Nikolic, B

Strongin, M

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 23期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.83.4880

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper we report the first experimental measurement of the low-temperature, normal-state infrared conductivity of ultrathin quenched-condensed Pb films. For de sheet resistances such that omega tau << 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.

引用

页码：4880 / 4883

页数：4

共 24 条

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Altshuler B.L., 1985, ELECT ELECT INTERACT

[2]

ASTRAKHARCHIK EG, 1977, SOV PHYS JETP, V45, P844

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