2013/06/30 by Alexandru Petrescu, Karyn Le Hur · 8 citations
Physics and Astronomy · #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Mott insulator #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Spin (aerodynamics) #Superfluidity #cond-mat.mes-hall #cond-mat.quant-gas #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.111.150601
published as PRL 111, 150601 (2013) · 5 pages + References. Additional Informations have been added to the Supplementary Material
arxiv created 2013/09/16 · openalex publication_date 2013/10/07 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We introduce a generic bosonic model exemplifying that (spin) Meissner currents can persist in insulating phases of matter. We consider two species of interacting bosons on a lattice. Our model exhibits separation of charge (total density) and spin (relative density): the charge sector is gapped in a bosonic Mott insulator phase with total density one, while the spin sector remains superfluid due to interspecies conversion. Coupling the spin sector to the gauge fields yields a spin Meissner effect reflecting the long-range spin superfluid coherence. We investigate the resulting phase diagram and describe other possible spin phases of matter in the Mott regime possessing chiral currents as well as a spin-density wave phase. The model presented here is realizable in Josephson junction arrays and in cold atom experiments.