Spin-charge conversion in interfacial electron liquids
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Spin-charge conversion in interfacial electron liquids
DIPC Seminars
- Speaker
-
G. Vignale, University of Missouri-Columbia
- When
-
2014/05/16
14:00
- Place
- Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4, Donostia
- Add to calendar
-
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![Spin-charge conversion in interfacial electron liquids](/++theme++dipc-theme/img/event_image_berdea.png)
Semiconductor quantum wells, inter-metallic interfaces, layered oxides, and
monolayer materials are all promising platforms for the observation of spin-
charge conversion due to strong spin-orbit interaction in the quasi two
dimensional electron liquid they host. In this talk I focus on two closely
related effects that can occur in these materials, namely the conversion of
charge current to spin current (spin Hall effect) and the generation of spin
polarization from an electric current (Edelstein effect). Together with their
inverses (in the sense of Onsager reciprocity relations), these effects
constitute a useful set of tools for spintronic applications. The theoretical
challenge is to provide a unified treatment of the different mechanisms at
work, including spin precession, spin relaxation, electron-impurity scattering
and electron-electron scattering. In this talk I show how the SU(2) drift-
diffusion theory allows such a unified treatment, and I describe its
application to the interpretation of recent experiments on spin-charge
conversion at the interface between two non-magnetic metals (Ag/Bi). I
conclude with a brief review of our recent results on the generation of
ordered spin structures from density-modulated structures and on the impact of
spatially-dependent spin-orbit couplings on the process of spin-charge
conversion.
J. C. Rojas-Sanchez, Nature Commun. 4, 2944 (2013).