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Binder Parameter in a Generalized Two-dimensional XY Model

Duong Xuan Nui, Truong Thi Bach Yen,Nguyen Huu Cuong, Luu Bich Linh, Bui Thi Toan Thu, Nguyen Vu Cam Binh, Nguyen Thi Huyen, Nguyen Ngoc Anh,Dao Xuan Viet

VNU Journal of Science Mathematics - Physics(2024)

Cited 0|Views11
Abstract
We performed Monte Carlo simulation for a two-dimensional generalized XY model and calculated the magnetic and nematic Binder parameters. The phase diagram is re-examined based on these Binder parameters, demonstrating their power in studying generalized XY models. The Binder parameter has distinctive behaviors, resulting in different types of phase transition. More importantly, the magnetic Binder parameter gives more insights into the tricritical region where the Kosterlitz-Thouless, Ising, and 1/2 Kosterlitz-Thouless (KT) transition lines meet. It shows signatures for the intermediate region starting from the tricritical point, where the transition line is neither the same physics as the Ising transition below nor the KT transition far above the tricritical point.
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