Columnar order and Ashkin-Teller criticality in mixtures of hard squares and dimers

Ramola, Kabir ; Damle, Kedar ; Dhar, Deepak (2015) Columnar order and Ashkin-Teller criticality in mixtures of hard squares and dimers Physical Review Letters, 114 (19). Article ID 190601. ISSN 0031-9007

Full text not available from this repository.

Official URL: https://journals.aps.org/prl/abstract/10.1103/Phys...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.114.190601

Abstract

We show that critical exponents of the transition to columnar order in a mixture of 2×1 dimers and 2×2 hard squares on the square lattice depends on the composition of the mixture in exactly the manner predicted by the theory of Ashkin-Teller criticality, including in the hard-square limit. This result settles the question regarding the nature of the transition in the hard-square lattice gas. It also provides the first example of a polydisperse system whose critical properties depend on composition. Our ideas also lead to some interesting predictions for a class of frustrated quantum magnets that exhibit columnar ordering of the bond energies at low temperature.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:112295
Deposited On:31 Jan 2018 04:29
Last Modified:31 Jan 2018 04:29

Repository Staff Only: item control page