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Correlation Between Quantum Conductance and Atomic Arrangement of Silver Atomic-Size Nanocontacts

Published online by Cambridge University Press:  31 October 2012

Pedro A. Autreto ,
Maureen J. Lagos ,
Daniel Ugarte  and
Douglas S. Galvao
Pedro A. Autreto
Affiliation:
Instituto de Física “Gleb Wataghin, Universidade Estadual de Campinas, Campinas - SP, 13083-970, Brazil
Maureen J. Lagos
Affiliation:
Instituto de Física “Gleb Wataghin, Universidade Estadual de Campinas, Campinas - SP, 13083-970, Brazil Laboratório Nacional de Luz Síncroton, Caixa Posta 6192, Campinas – SP, 13084-971 Brazil
Daniel Ugarte
Affiliation:
Instituto de Física “Gleb Wataghin, Universidade Estadual de Campinas, Campinas - SP, 13083-970, Brazil
Douglas S. Galvao
Affiliation:
Instituto de Física “Gleb Wataghin, Universidade Estadual de Campinas, Campinas - SP, 13083-970, Brazil
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Abstract

In this work we have studied the importance of thermal effects on the structural and transport properties of Ag atomic-size nanowires (NWs) generated by mechanical stretching. Our study involve time-resolved atomic high resolution transmission electron microscopy imaging and quantum conductance measurement using an ultra-high-vacuum mechanically controllable break junction combined with quantum transport calculations. We have observed drastic changes in conductance and structural properties of Ag NWs generated at different temperatures (150 and 300 K). By combining electron microscopy images, electronic transport measurements and theoretical modeling, we have been able to establish a consistent correlation between the conductance and structural properties of Ag NWs. In particular, our study has revealed the formation of metastable rectangular rod-like Ag wires along the [001] crystallographic direction.

Keywords

Agnanostructuretransmission electron microscopy (TEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1429: Symposium D – Nanocontacts—Emerging Materials and Processing for Ohmicity and Rectification , 2012 , mrss12-1429-d01-03
Copyright
Copyright © Materials Research Society 2012

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References

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