Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Magnetic Particles / Clusters

MA 35.10: Vortrag

Mittwoch, 22. März 2017, 11:45–12:00, HSZ 101

Electronic theory of multicenter complexes as logic elements — •Dibyajyoti Dutta¹, Debapriya Chaudhuri^1,2, Georgios Lefkidis¹, and Wolfgang Hübner¹ — ¹University of Kaiserslautern and Research Center OPTIMAS, Kaiserslautern, Germany — ²SPINTEC CEA, Grenoble, France

We present a first-principles study of ultrafast spin dynamics on small magnetic Ni/Co clusters. The cooperative effects, due to the electronic correlations and the abundance of d electrons, allow the coherent spin manipulation controlled with femtosecond laser pulses [1]. Using already established spin flip and transfer scenarios, one can construct magnetic logic gates.

Previously, we reported results on the synthesis, characterization and suggested laser-induced spin dynamics on ligand-decorated Co₃ and Ni₃ structures [2,3]. Here we extend our study to the [Co₃Ni]⁺EtOH complex. A high-level ab initio calculation suggests a pyramidal structure of the [Co₃Ni] part, in agreement with the spectroscopic data. Our findings suggest that optical spin manipulation in magnetic molecules can be used for future nanospintronic devices.

[1] W. Jin, F. Rupp, K. Chevalier, M. M. N. Wolf, M. Colindres-Rojas, G. Lefkidis, H.-J. Krüger, R. Diller, and W. Hübner, Phys. Rev. Lett. 109, 267209 (2012)

[2] W. Jin, C. Li, G. Lefkidis, W. Hübner, Phys. Rev. B 89, 024419 (2014)

[3] D. Chaudhuri, W. Jin, G. Lefkidis, and W. Hübner, J. Chem. Phys. 143, 174303 (2015)