Spin-orbit-coupling-induced magnetic heterostructure in the bilayer Bose-Hubbard system

TL;DR

This paper explores how spin-orbit coupling in a bilayer ultracold boson system leads to diverse magnetic textures, including rare heterochiral magnet states, with detailed proposals for experimental realization.

Contribution

It introduces a novel bilayer Bose-Hubbard model with spin-orbit coupling, revealing complex magnetic phases and proposing experimental methods for realization in cold atom systems.

Findings

Identification of various spin textures such as hetero ferromagnet, heterochiral magnet, and chiral magnet.

Discovery of rare heterochiral magnet induced by spin-orbit coupling.

Detailed experimental setup for realizing the model in ultracold atom systems.

Abstract

We investigate magnetic phase in the bilayer system of ultra-cold bosons in an optical lattice, which is involved with Raman-induced spin-orbit (SO) coupling and laser-assisted interlayer tunneling. It is shown that there exit a rich of spin textures such as hetero ferromagnet, heterochiral magnet, chiral magnet with interlayer antiferromagnet. In particular, heterochiral magnet induced by SO coupling occurs extremely rarely in real solid-state materials. We present detailed experimental setup of realizing such a model in cold atom system.