A spin-orbit playground
Surfaces and interfaces of transition metal oxides
S. Gariglio (Université de Genève)
A. Caviglia (Kavli institute of nanoscience Delft, TU Delft - QN/Caviglia Lab)
J. M. Triscone (Université de Genève)
M. Gabay (Université Paris-Saclay)
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Abstract
Within the last twenty years, the status of the spinorbit interaction has evolved from that of a simple atomic contribution to a key effect that modifies the electronic band structure of materials. It is regarded as one of the basic ingredients for spintronics, locking together charge and spin degrees of freedom and recently it is instrumental in promoting a new class of compounds, the topological insulators. In this review, we present the current status of the research on the spinorbit coupling in transition metal oxides, discussing the case of two semiconducting compounds, SrTiO3and KTaO3, and the properties of surface and interfaces based on these. We conclude with the investigation of topological effects predicted to occur in different complex oxides.