论文标题
双层人造自旋冰：磁力开关和基本热力学
Bilayer artificial spin ice: magnetic force switching and basic thermodynamics
论文作者
论文摘要
我们研究了一个人造自旋冰系统，该系统由两个相同的层组成，这些层由高度偏移$ h $组成。对于小分离，只要整个系统处于基态，这些层被证明会相互吸引。这样的吸引力是通过幂律力量与范德华力量相比的。当磁性单孔发生在一个（或两种）层中时，场景就会变得更加有趣，并且这些层也可能相互排斥。通过调整$ H $和单极距离之类的参数，可以以可行的方式完成吸引力和排斥之间的切换。关于其热力学，随着$ H $的增加，特定的热峰会转移到较低的温度。
We study an artificial spin ice system consisting of two identical layers separated by a height offset $h$. For small separation, the layers are shown to attract each other, provided the whole system is in the ground state. Such an attraction comes about by means of a power-law force that we compare to van der Waals forces. When magnetic monopoles occur in one (or both) layers, the scenario becomes even more interesting and these layers may also repel each other. By tuning parameters like $h$ and monopole distance, switching between attraction and repulsion may be accomplished in a feasible way. Regarding its thermodynamics, the specific heat peak shifts to lower temperature as $h$ increases.
