Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 93: Transport: Spintronics and Magnetotransport (Joint session of DS, HL, MA and TT, organized by TT)
HL 93.5: Vortrag
Donnerstag, 10. März 2016, 17:45–18:00, H23
Spin-vibronics in interacting nonmagnetic molecular nanojunctions — •Stephan Weiss1, Jochen Brüggemann2, and Michael Thorwart2 — 1Theoretische Physik, Universität Duisburg-Essen & CENIDE — 21. Institut für Theoretische Physik, Universität Hamburg
We show that in the presence of ferromagnetic electronic reservoirs and
spin-dependent tunnel couplings, molecular vibrations in nonmagnetic single
molecular transistors induce an effective intramolecular exchange magnetic
field[1]. It generates a finite spin-accumulation and -precession for the
electrons confined on the molecular bridge and occurs under
(non)equilibrium conditions. The effective exchange magnetic field is calculated here to lowest order in the tunnel coupling for
a nonequilibrium transport setup. Coulomb interaction between electrons is taken into account as well as a finite electron-phonon coupling. For realistic physical parameters, an effective spin-phonon coupling emerges. It is induced by quantum many-body interactions, which are either electron-phonon or Coulomb-like.
S. Weiss, J. Brüggemann and M. Thorwart,
PRB 92, 045431 (2015).