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arXiv · 1205.1806

Quantum phases of Bose-Bose mixtures on a triangular lattice

Liang He·Yongqiang Li·Ehud Altman·Walter Hofstetter
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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.

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Liang He, Yongqiang Li, Ehud Altman, Walter Hofstetter. 2012-05-08. Quantum phases of Bose-Bose mixtures on a triangular lattice. https://doi.org/10.1103/physreva.86.043620

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