Influence of relativistic effects on the contact formation of transition metals
| Autor: | E. B. Lombardi, Carlos Sabater, M. R. Calvo, W. Dednam, Carlos Untiedt, Maria J. Caturla |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Física Aplicada, Grupo de Nanofísica, Física de la Materia Condensada |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Condensed Matter - Materials Science
Física de la Materia Condensada Condensed Matter - Mesoscale and Nanoscale Physics Contact formation Relativistic effects Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Physics and Astronomy Transition metals 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Scholarship Física Aplicada Political science Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics 0210 nano-technology Humanities |
| Zdroj: | ResearcherID RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | Our analysis of the contact formation processes undergone by Au, Ag and Cu nanojunctions, reveals that the distance at which the two closest atoms on a pair of opposing electrodes jump into contact is, on average, two times longer for Au than either Ag or Cu. This suggests the existence of a longer range interaction between those two atoms in the case of Au, a result of the significant relativistic energy contributions to the electronic structure of this metal, as confirmed by ab initio calculations. Once in the contact regime, the differences between Au, Ag and Cu are subtle, and the conductance of single-atom contacts for metals of similar chemical valence is mostly determined by geometry and coordination. 4 pages, 4 figures |
| Databáze: | OpenAIRE |
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