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arXiv · 1811.05499

Confinement transition in a Kitaev-like honeycomb model with bond anisotropy

Gideon Wachtel·Dror Orgad
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Abstract

The honeycomb $K-\Gamma$ model is known to have both deconfined spin liquid and confined phases. We study here a confinement transition between the Kitaev spin liquid and a dimerized phase in the limit of strong bond anisotropy. By partially projecting out Majorana states we are able to map the model onto a model of weakly coupled Ising chains in a transverse field. Within this mapping the ordered Ising phase corresponds to the condensation of $Z_2$ fluxes, or confinement. Our results may improve our understanding of the extensively studied spin liquid candidate material $\alpha$-RuCl$_3$, where $K-\Gamma$ interactions are dominant.

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Gideon Wachtel, Dror Orgad. 2018-11-13. Confinement transition in a Kitaev-like honeycomb model with bond anisotropy. https://doi.org/10.1103/physrevb.99.115104

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