Spin Hall effect in heavy ion collisions

Understand

Spin Hall effect (SHE) is the generation of spin current due to an electric field, and has been observed in a variety of materials.

• The analogous spin Hall current can be induced by chemical potential and temperature gradient, both of which are present in hot and dense nuclear matter created in heavy-ion collisions.
• In this letter, we investigate the perspective of detecting spin Hall current experimentally.
• We propose to measure "directed spin flow", the first Fourier coefficients of local spin polarization of $\Lambda$ ($\bar{\Lambda}$) hyperon, at central collisions to probe spin Hall current.