Berlin 2018 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 27: Postersession KFM

KFM 27.27: Poster

Donnerstag, 15. März 2018, 15:00–17:00, Poster E

Quantum electronic scattering in a Au/Co/Au nanowire lead — Adel Belayadi¹ and •Boualem Bourahla² — ¹University of M. Bougara, Department of Coating Material and Environmental, Boumerdes, Algeria — ²Laboratory of Physics and Quantum Chemistry, M. Mammeri University, Tizi-Ouzou, Algeria

In the present contribution, we provide a theoretical model to investigate the electron scattering states in a one-dimensional atomic chain which contains a single defect atom. In fact, in ideal leads the translation symmetry is treated by periodic boundary conditions. However, in the case of a defect, the Bloch theorem is not applicable. In other words, the single defect atom breaks the symmetry and makes the solution of eigenvalues problem impossible. To deal with inhomogeneous systems, due to lack of symmetry, we have integrated the phase field matching theory (PFMT) to compute the eigenvalue problem of our system. The PFMT connects the left and right leads, separated by the defect atom, in terms of the total transmission and reflection probabilities of the Landauer-Büttiker formalism. As application, we build up the Hamiltonian matrix in the tight-binding approach and then we compute the coherent scattering and transport of electron as well as the electronic conductance across the defect junction given as copper/cobalt/copper, while the cobalt atom is treated as a defect atom.