Libál A, Reichhardt C J Olson, Reichhardt C
Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Phys Rev Lett. 2009 Jun 12;102(23):237004. doi: 10.1103/PhysRevLett.102.237004.
We demonstrate that it is possible to realize vortex ice states that are analogous to square and kagome ice. With numerical simulations, we show that the system can be brought into a state that obeys either global or local ice rules by applying an external current according to an annealing protocol. We explore the breakdown of the ice rules due to disorder in the nanostructure array and show that in square ice, topological defects appear along grain boundaries, while in kagome ice, individual defects appear. We argue that the vortex system offers significant advantages over other artificial ice systems.
我们证明，有可能实现类似于方形冰和 kagome 冰的涡旋冰态。通过数值模拟，我们表明，根据退火协议施加外部电流，可以使系统进入服从全局或局部冰规则的状态。我们研究了由于纳米结构阵列中的无序导致的冰规则的破坏，并表明在方形冰中，拓扑缺陷沿着晶界出现，而在 kagome 冰中，单个缺陷出现。我们认为，与其他人工冰系统相比，涡旋系统具有显著优势。
