Many-body spin Hall effect with space-inversion symmetry

TL;DR

This paper proposes a many-body spin Hall effect induced by dipole-dipole interactions in ultracold magnetic atoms, which preserves space-inversion symmetry and could enable new spin current generation methods.

Contribution

It introduces a novel many-body spin Hall effect driven by dipole-dipole interactions, distinct from the traditional spin-orbit interaction-based effect.

Findings

Demonstrates the feasibility of observing the many-body SHE in ultracold magnetic atom systems.

Shows the DDI-based SHE preserves space-inversion symmetry, unlike conventional SHE.

Highlights potential applications in spintronics and atomtronics.

Abstract

In contrast to the ordinary spin Hall effect (SHE), which is a single-body phenomenon caused by the spin-orbit interaction (SOI), we propose amany-body SHE induced by the dipole-dipole interaction (DDI) between particles and demonstrate it in a system of ultracold magnetic atoms. While the SOI usually requires the breaking of space-inversion symmetry, the DDI preserves it. The many-body SHE can, in principle, be observed in a wide range of systems with large dipole moments and offers a powerful tool to generate spin currents, an essential ingredient in spintronics and atomtronics.