论文标题
J1-J2 ISING模型中的亚稳态状态
Metastable states in the J1-J2 Ising model
论文作者
论文摘要
我们使用随机局部场近似（RLFA）和Monte Carlo（MC）模拟在方形晶格上研究J1-J2 ISING模型，以p = j2/| j1的各种值p = j2/| j1 |使用抗铁磁耦合J2，确保旋转挫败感。 RLFA预测（0,1）p \ in低温下的零顺序参数（极化）的亚稳态状态。这是由我们的MC模拟支持的，其中系统不仅将其放松到具有零，而且具有任意极化的亚稳态状态，具体取决于其初始值，外部场和温度。我们通过在与MC计算相关的单个自旋掷出水平上计算这些状态的能量屏障来支持我们的发现。我们讨论适用于预测的实验验证的实验条件和化合物。
We study the J1-J2 Ising model on the square lattice using the random local field approximation (RLFA) and Monte Carlo (MC) simulations for various values of the ratio p = J2/|J1| with antiferromagnetic coupling J2, ensuring spin frustration. RLFA predicts metastable states with zero order parameter (polarization) at low temperature for p \in (0,1). This is supported by our MC simulations, in which the system relaxes into metastable states with not only zero, but also with arbitrary polarization, depending on its initial value, external field, and temperature. We support our findings by calculating the energy barriers of these states at the level of individual spin flips relevant to the MC calculation. We discuss experimental conditions and compounds appropriate for experimental verification of our predictions.
