Isakov, S. V. ; Wessel, S. ; Melko, R. G. ; Sengupta, K. ; Kim, Yong Baek (2006) Hard-core Bosons on the Kagome lattice: valence-bond solids and their quantum melting Physical Review Letters, 97 (14). 147202_1-217001_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v97/i14/e147202
Related URL: http://dx.doi.org/10.1103/PhysRevLett.97.147202
Abstract
Using large scale quantum Monte Carlo simulations and dual vortex theory, we analyze the ground state phase diagram of hard-core bosons on the kagome lattice with nearest-neighbor repulsion. In contrast with the case of a triangular lattice, no supersolid emerges for strong interactions. While a uniform superfluid prevails at half filling, two novel solid phases emerge at densities ρ=⅓ and ρ=⅔. These solids exhibit an only partial ordering of the bosonic density, allowing for local resonances on a subset of hexagons of the kagome lattice. We provide evidence for a weakly first-order phase transition at the quantum melting point between these solid phases and the superfluid.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 81329 |
Deposited On: | 06 Feb 2012 05:08 |
Last Modified: | 18 May 2016 22:56 |
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