Theory of Condensed Matter: Hard Condensed Matter

Jan. 26, 2016 at 2:15 p.m. in Galileiraum

Prof. Dr. Jairo Sinova
Institut für Physik, SPICE

Spin current swapping and spin Hall effect in a 2DEG

In this talk I will present some of the results obtained over the last year about spin-orbit induced effects in a two-dimensional electron gas. At first I will discuss the spin current swapping effect according to which a spin current flowing in the i direction with spin polarization along the j axis is converted into a spin current flowing in the j direction with spin polarization along the i axis.
I will analyze the circumstances under which to observe the effect and its connection with the spin Hall effect. As a second topic I will focus on the spin Hall effect due to the skew-scattering mechanism induced by phonon scattering. A comparison will be made with the standard skew-scattering due to impurities and the consequences for the temperature dependence of the spin Hall angle will be analyzed. Finally, I will present a model with a striped Rashba spin-orbit coupling, which could possibly be realized in LAO/STO interfaces. Such a non homogeneous spin-orbit coupling may give rise to a spin Hall effect robust with respect to impurity scattering.