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PGI-1 Seminar: Dr. Julen Azpiroz

Spin-orbit induced effects in heavy-element surfaces from first principles


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19.Jun.2013 11:30
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PGI-Hörsaal

Materia Kondentsatuaren Fisika Saila, Zientzia eta Teknologia Fakultatea, Euskal Herriko Unibertsitatea, Basque Country


Abstract:

We study from first principles the relativistic electron structure of heavy element surfaces with strong spin-orbit interaction.  In particular, we analyze the spin-polarization associated to spin-splitted surface states in the Tl/Si(111) and Pb/Ge(111) surfaces. We also analyze the excitations induced by a time-dependent electric field among the surface states employing a formalism based on the maximally localized Wannier functions. We find that these excitations can absorb a significant part of the total irradiated light, even though the underlying mechanism is a second-order relativistic effect.

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de

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