论文标题
旋转1/2中量子自旋挫败感的出现在装饰蜂窝状晶格上
Emergence of quantum spin frustration in spin-1/2 Ising-Heisenberg model on a decorated honeycomb lattice
论文作者
论文摘要
我们在装饰的蜂窝状晶格上研究了Spin-1/2 ISING-XXZ模型，该蜂窝晶格由五个单位细胞，一个ising旋转和四个Heisenberg旋转组成。这种涉及海森堡交换相互作用的模型是可以通过广义的恒星三角变换来解决的少数模型之一。该模型的意义在于它与完全装饰的量子Heisenberg Honeycomb晶格的密切关系，因为4/5颗粒是海森伯格旋转。我们研究了零温度下的相图，并确定了由量子海森堡交换相互作用的贡献而产生的相关量子自旋挫折相。我们获得了量子自旋挫折相的精确残留熵，这与三角形晶格上的抗磁性自旋1/2 ising模型的残留熵相吻合。我们还彻底探索了其热力学特性，主要集中在挫败的区域，例如熵，特定的热量，自发磁化以及在几种条件下的临界温度。
We study the spin-1/2 Ising-XXZ model on a decorated honeycomb lattice composed of five spins per unit cell, one Ising spin, and four Heisenberg spins. This model involving the Heisenberg exchange interaction is one of the few models that can be exactly solvable through the generalized star-triangle transformation. The significance of this model is its close relationship to the fully decorated quantum Heisenberg honeycomb lattice since 4/5 of the particles are Heisenberg spins. We investigate the phase diagram at zero temperature and identify a relevant quantum spin frustrated phase resulting from the contribution of quantum Heisenberg exchange interaction. We obtain an exact residual entropy for the quantum spin frustrated phase, which coincides with the residual entropy of the antiferromagnetic spin-1/2 Ising model on a triangular lattice. We also thoroughly explore its thermodynamic properties, focusing mainly on the frustrated region such as entropy, specific heat, spontaneous magnetization, and critical temperature under several conditions.
