Volume 67, Number 2, July 2004
|Page(s)||254 - 260|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 July 2004|
Localization lengths of ultrathin disordered gold and silver nanowires
Departamento de Ciências Exatas, Universidade Federal de Lavras 37200-000 Lavras, MG, Brazil
2 Instituto de Física, Universidade Federal Fluminense - 24210-340 Niterói, RJ, Brazil
3 Department of Physics and Astronomy, University of California Irvine, CA, 92697 USA
Corresponding author: email@example.com
Accepted: 4 May 2004
The localization lengths of ultrathin disordered and nanowires are estimated by calculating the wire conductances as functions of wire lengths. We study and monoatomic linear chains, and thicker wires with very small cross-sections. For the monoatomic chains we consider two types of disorder: bounded random fluctuations of the interatomic distances, and the presence of random substitutional impurities. The effect of impurity atoms on the nanowire conductance is much stronger. Our results show that electrical transport in ultrathin disordered wires may occur in the strong localization regime, and with relatively small amounts of disorder the localization lengths can be very small. The localization length dependence on wire thickness is investigated for nanowires with different impurity concentrations.
PACS: 73.20.Fz – Weak or Anderson localization / 73.21.Hb – Quantum wires
© EDP Sciences, 2004
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