Phase transition and monopole densities in a nearest neighbor two-dimensional spin ice model

被引：1

作者：

Morais, C. W. ^{[1
]}

De Freitas, D. N. ^{[1
]}

Mota, A. L. ^{[1
]}

Bastone, E. C. ^{[1
]}

机构：

[1] Univ Fed Sao Joao del Rei, Dept Ciencias Nat, Campus Dom Bosco,Praca Dom Helvecio 74, BR-36301160 Sao Joao Del Rei, MG, Brazil

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2017年 / 31卷 / 31期

关键词：

Two-dimensional square spin ice; Ising-like models; magnetic monopoles on spin ice; MAGNETIC MONOPOLES; GEOMETRICAL FRUSTRATION; SIGNATURE; DY2TI2O7; ENTROPY; CHARGE;

D O I：

10.1142/S021797921750237X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work, we show that, due to the alternating orientation of the spins in the ground state of the artificial square spin ice, the influence of a set of spins at a certain distance of a reference spin decreases faster than the expected result for the long range dipolar interaction, justifying the use of the nearest neighbor two-dimensional square spin ice model as an effective model. Using an extension of the model presented in Y. L. Xie et al., Sci. Rep. 5, 15875 (2015), considering the influence of the eight nearest neighbors of each spin on the lattice, we analyze the thermodynamics of the model and study the dependence of monopoles and string densities as a function of the temperature.

引用

页数：17

共 54 条

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