Quantum phases of Bose-Bose mixtures on a triangular lattice

Abstract

We investigate the zero temperature quantum phases of a Bose-Bose mixture on a triangular lattice using Bosonic Dynamical Mean Field Theory (BDMFT). We consider the case of total filling one where geometric frustration arises for asymmetric hopping. We map out a rich ground state phase diagram including xy-ferromagnetic, spin-density wave, superfluid, and supersolid phases. In particular, we identify a stripe spin-density wave phase for highly asymmetric hopping. On top of the spin-density wave, we find that the system generically shows weak charge (particle) density wave order.

6 pages, 3 figures

References in corpus (4)

• Quantum magnetism and criticality
• Supersolid hardcore bosons on the triangular lattice
• Correlated bosons on a lattice: Dynamical mean-field theory for Bose-Einstein condensed and normal phases
• Variational wavefunction study of the triangular lattice supersolid

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