Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 4: Transport: Quantum Dots, Wires, Point Contacts 1 (jointly with HL and TT)

O 4.3: Vortrag

Montag, 11. März 2013, 10:00–10:15, H20

Structure and conductance analysis of atomic-sized contacts — •Manuel Matt¹, Fabian Pauly¹, Juan Carlos Cuevas², and Peter Nielaba¹ — ¹University of Konstanz, Department of Physics, 78457 Konstanz, Germany — ²Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain

We study the conductance histograms of different metals such as Au and Al. Our theoretical approach combines molecular dynamics simulations of the stretching of atomic-sized wires with the non-equilibrium Green’s function formalism based on the tight-binding modelling of the electronic system. As compared to pervious work [1,2], we consider substantially larger wires and explore different lattice orientations. The results show good agreement with experiments.
[1] M. Dreher, F. Pauly, J. Heurich, J. C. Cuevas, E. Scheer, and P. Nielaba, Phys. Rev. B 72, 075435 (2005)
F. Pauly, M. Dreher, J. K. Viljas, M. Häfner, J. C. Cuevas, and P. Nielaba Phys. Rev. B 74, 235106 (2006)