title: Partial order and finite-temperature phase transitions in Potts models on irregular lattices.
abstract: We evaluate the thermodynamic properties of the 4-state antiferromagnetic Potts model on the Union-Jack lattice using tensor-based numerical methods. We present strong evidence for a previously unknown, "entropy-driven," finite-temperature phase transition to a partially ordered state. From the thermodynamics of Potts models on the diced and centered diced lattices, we propose that finite-temperature transitions and partially ordered states are ubiquitous on irregular lattices.
authors: Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, China.
authors: Q N
authors: QN
authors: Chen
authors: M P
authors: MP
authors: Qin
authors: J
authors: J
authors: Chen
authors: Z C
authors: ZC
authors: Wei
authors: H H
authors: HH
authors: Zhao
authors: B
authors: B
authors: Normand
authors: T
authors: T
authors: Xiang