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Spin-orbit coupling is a fundamental interaction in condensed systems, which plays an important role in modern application of magnetism such as current control of magnetic moments. We showed that in specific interacting electron systems spin-orbit interaction may arise by the mechanism spontaneous symmetry breaking. The new low-temperature state has peculiar magnetic properties, e.g., it carries a macroscopic spin current. We predict that in this state it is possible to generate magnetic moments by application of electric current.
Description
Phase diagram of the studied model showing the phase with spin texture (yellow). Right: Distribution of the spin polarization in the momentum space showing that electrons moving in the ‘upper right’ direction are polarized opposite to the electrons moving in the ‘bottom left’ direction.