Berlin 2015 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 9: Transport: Spintronics and Magnetotransport (jointly with HL, MA)

TT 9.7: Talk

Monday, March 16, 2015, 11:15–11:30, A 053

Spin-orbit induced longitudinal spin transport in non-magnetic solids — •Sebastian Wimmer, Marten Seemann, Kristina Chadova, Diemo Ködderitzsch, and Hubert Ebert — Ludwig-Maximilians-Universität München, München, Deutschland

A group-theoretical scheme is presented that allows investigating the symmetry properties of response tensors relevant to the field of spintronics. For the spin conductivity tensor it is shown that only the magnetic Laue group has to be considered in this context. In this case non-vanishing transverse elements, found without making reference to the two-current model, give rise to the spin Hall and Edelstein effects in non-magnetic as well as magnetic solids. In the latter case non-vanishing longitudinal elements cause among others the spin-dependent Seebeck effect. For non-magnetic solids having low symmetry non-vanishing longitudinal elements are shown to exist as well. These give rise to spin-orbit induced longitudinal spin transport that has not been considered before. Numerical studies confirm these findings and demonstrate that the longitudinal spin conductivity may be in the same order of magnitude as the conventional transverse one.