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Theoretical study of conductance in stretched monatomic nanowires |
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| Authors: | Fabien Picaud Vincent PouthierClaude Girardet Erio Tosatti |
| Institution: | a Laboratoire de Physique Moleculaire, UMR CNRS 6624, Faculté des sciences, La Bouloie, Université de Franche-Comté, 16 route de gray, 25030 Besançon, France b SISSA Via Beirut 2/4, 34014 Trieste, Italy c INFM Democritos National Simulation Center, INFM, Unità SIIS, Via Beirut 2/4, 34014 Trieste, Italy d ICTP, Strada Costiera 11, 34014 Trieste, Italy |
| Abstract: | Recent experiments showed that the last, single channel conductance step in monatomic gold contacts exhibits significant fluctuations as a function of stretching. From simulations of a stretched gold nanowire linked to deformable tips, we determine the distribution of the bond lengths between atoms forming the nanocontact and analyze its influence on the electronic conductance within a simplified single channel approach. We show that the inhomogeneous distribution of bond lengths can explain the occurrence and the 5% magnitude of conductance fluctuations below the quantum conductance unit g0=2e2/h. |
| Keywords: | Gold Green&rsquo s function methods Surface electrical transport (surface conductivity surface recombination etc ) |
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