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TT: Fachverband Tiefe Temperaturen

TT 66: Poster Session Transport

TT 66.7: Poster

Donnerstag, 19. März 2020, 15:00–19:00, P2/EG

Spin-orbit coupling drives entangled dynamics in a single molecule junction — •Moritz Frankerl and Andrea Donarini — Institut für Theoretische Physik, Universität Regensburg, 93035 Regensburg, Germany

Experiments based on THz-STM have shown how to obtain both space and time resolution of single molecule vibrations on their intrinsic length and time scales [1]. We report here the theoretical investigations on electronic dynamics of a copper-phthalocynanine in a THz-STM set-up. The quasi-degenerate anionic states of the molecule allow for a coupled spin and pseudo-spin description [2]. The spin-orbit interaction on the metallic centre is responsible, in combination with the ligand, for an intrinsic molecular spin-anisotropy .The latter is modulated, in the junction, by the coupling to the ferromagnetic tip which moreover, generates exchange fields on the molecule [3,4]. We study the resulting entangled spin and orbital dynamics directly in the time domain within a generalized master equation approach.

[1] T. L. Cocker et al., Nature 539, 263-267 (2016)

[2] B. Siegert et al., Beilstein J. Nanotechnol. 6, 2452 (2015)

[3] M. Braun et al., Phys. Rev. B 70, 195345 (2004)

[4] A. Donarini et al. Nano Lett. 9, 2897 (2009)