Ferromagnetic spin-orbital liquid of dipolar fermions in zigzag lattices

Abstract

Two-component dipolar fermions in zigzag optical lattices allow for the engineering of spin-orbital models. We show that dipolar lattice fermions permit the exploration of a regime typically unavailable in solid-state compounds that is characterized by a novel spin-liquid phase with a finite magnetization and spontaneously broken SU(2) symmetry. This peculiar spin liquid may be understood as a Luttinger liquid of composite particles consisting of bound states of spin waves and orbital domain walls moving in an unsaturated ferromagnetic background. In addition, we show that the system exhibits a boundary phase transitions involving non-local entanglement of edge spins.

arXiv comment5 pages, 6 figures

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Cited by in corpus (4)

• Ground-state phases of rung-alternated spin-1/2 Heisenberg ladder
• Magnetic phase diagram and quantum phase transitions in a two-species boson model
• Topological phases of spinless $p$-orbital fermions in zigzag optical lattices
• Topological order-by-disorder in orbitally degenerate dipolar bosons in zig-zag lattice