Worm-type Monte Carlo simulation of the Ashkin-Teller model on the triangular lattice

Jian-Ping Lv, Youjin Deng, Qing-Hu Chen

We investigate the symmetric Ashkin-Teller (AT) model on the triangular lattice in the antiferromagnetic two-spin coupling region ($J<0$). In the $J\to -\infty$ limit, we…