Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/104790
Type: Artigo de periódico
Title: Structural And Electronic Properties Of Atomic-size Wires At Low Temperatures
Author: Lagos M.
Rodrigues V.
Ugarte D.
Abstract: We have studied structural and electrical behavior of gold nanowires generated by mechanical elongation at liquid nitrogen temperature. Real-time observations using a low temperature sample holder in a high resolution transmission electron microscopy and, an ultra-high-vacuum compatible mechanically controllable break junction modified to cool the sample region have been used. It has been observed that the narrowest region of gold constrictions is crystalline and defect-free at room temperature, but this pattern is quite different at 150 K. Extended defects (e.g. twins) generate defective nanometer constrictions, indicating a very different structural evolution pattern during stretching. The generation of different atomic arrangements can be also deduced from transport measurements at low temperature. Finally, one-atom-size nanowires seem to be more stable at 150 K, as revealed by very long conductance plateaus at one quantum of conductance (lasting ∼5-10 times longer than at room temperature). © 2007 Elsevier B.V. All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.elspec.2006.12.063
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-34247131198&partnerID=40&md5=2256c6345a6d3b079254e5df8a575b03
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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