论文标题
施加磁场中自旋-1元素的有限温度热力学特性
Finite temperature thermodynamic properties of the spin-1 nematics in an applied magnetic field
论文作者
论文摘要
我们从数值上研究自旋1双线性 - 生物模型中磁场中自旋列中阶段的热力学特性。当应用场时，相变温度一旦上升，然后迅速降低到零，这是通过特定热量中的峰值变化检测到的。重进入行为的基本机制是熵效应。在弱场中，高温顺磁相迅速失去其熵，而铁四极性列相位通过修饰铁峰极矩的形状来保持稳健。此特征是通用铁极相的指纹，而对于抗fiferroquadrupoles的情况未观察到。
We study numerically the thermodynamic properties of the spin nematic phases in a magnetic field in the spin-1 bilinear-biquadratic model. When the field is applied, the phase transition temperature once goes up and then decreases rapidly toward zero, which is detected by the peak-shift in the specific heat. The underlying mechanism of the reentrant behavior is the entropic effect. In a weak field the high temperature paramagnetic phase rapidly loses its entropy while the ferroquadrupolar nematic phase remains robust by modifying the shape of the ferroquadrupolar moment. This feature serves as a fingerprint of generic ferroquadrupolar phases, while it is not observed for the case of antiferroquadrupoles.
