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arXiv · 1607.05109

Exotic Topological States with Raman-Induced Spin-Orbit Coupling

Y. Deng·T. Shi·H. Hu·L. You·S. Yi
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Abstract

We propose a simple experimental scheme to realize simultaneously the one-dimensional spin-orbit coupling and the staggered spin-flip in ultracold pseudospin-$1/2$ atomic Fermi gases trapped in square optical lattices. In the absence of interspecies interactions, the system supports gapped Chern insulators and gapless topological semimetal states. By turning on the $s$-wave interactions, a rich variety of gapped and gapless inhomogeneous topological superfluids can emerge. In particular, a gapped topological Fulde-Ferrell superfluid, in which the chiral edge states at opposite boundaries possess the same chirality, is predicted.

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Y. Deng, T. Shi, H. Hu, L. You, S. Yi. 2017-02-13. Exotic Topological States with Raman-Induced Spin-Orbit Coupling. https://doi.org/10.1103/physreva.95.023611

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