Programme

O.2 -- Oral, VCTP-44

Date: Monday, 29 July 2019

Time: 11:00 - 11:20

Wang-Landau simulation of smectic phases

Phuong-Thuy Nguyen (1), T.-L. Hoai Nguyen (1), V. Thanh Ngo (1), H. T. Diep (2)

(1) Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ngoc Khanh, Ba Dinh, Hanoi; (2) Laboratoire de Physique Théorique et Modélisation, Université de Cergy-Pontoise, CNRS, UMR 8089, 2 Avenue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France

Liquid crystals have been extensively studied for more than 30 years due to their applications in electronic display devices. In spite of this, macroscopic models for the formation of ordering in liquid crystals are still missing. Much works have been based on the phenomenological Frank's free energy. In this work, using a microscopic Hamiltonian we study the transition of smectic phases by the Wang-Landau Monte-Carlo simulation. We use the mobile q-states Potts model for the molecules which can move from one site to another on a lattice. The Potts spin has 6 states corresponding to 6 different spatial molecular orientations. The simulation results clearly showed the existence of two melting points which is observed in the experiments

Presenter: Ngo Van Thanh