Topological nodal chains in optical lattices
arXiv:2103.11291 · doi:10.1103/PhysRevA.103.033316
Abstract
Topological nodal rings as the simplest topological nodal lines recently have been extensively studied in optical lattices. However, the realization of complex nodal line structures like nodal chains in this system remains a crucial challenge. Here we propose an experimental scheme to realize and detect topological nodal chains in optical Raman lattices. Specifically, we construct a three-dimensional optical Raman lattice which supports next nearest-neighbor spin-orbit couplings and hosts topological nodal chains in its energy spectra. Interestingly, the realized nodal chains are protected by mirror symmetry and could be tuned into a large variety of shapes, including the inner and outer nodal chains. We also demonstrate that the shapes of the nodal chains could be detected by measuring spin polarizations. Our study opens up the possibility of exploring topological nodal-chain semimetal phases in optical lattices.
arXiv comment9 pages, 3 figures
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- Topological optical Raman superlattices
- Characterizing Floquet topological phases by quench dynamics: A multiple-subsystem approach
- Chiral spin liquid phase in an optical lattice at mean-field level
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