Programme

P.17 -- Poster, VCTP-48

Date: Tuesday, 1 August 2023

Time: 08:30 - 10:00

Ordered Phase in the spin-1 Heisenberg model on the anisotropic triangular lattice

Nguyen Van Hinh (1); Pham Thi Thanh Nga (2) and Nguyen Toan Thang (3)

(1): Hanoi University of Industry, 298 Cau Dien, Bac Tu Liem, Hanoi, Vietnam; (2): Faculty of Electrical and Electronics Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam; (3): Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi 11108, Vietnam

We study the effect of fluctuations and spatial anisotropy on the stability of the long-range order of the three-sublattice structure in the spin-1 anisotropic Heisenberg model. The Popov-Fedotov functional integral method and the Luttinger-Tizza process were used to calculate the thermodynamic quantities and determine the ground state. The perturbation expansion of the auxiliary-field around mean-field theory was carried out to investigate the effect of thermal fluctuations on ground state energy and sublattice magnetization. The work is motivated by recent theoretical researches and experimental findings on Ni2+ -based compounds.

Presenter: Nguyễn Văn Hinh