偶极阿勒颇晶格:无顶点阻挫条件下的基态有序与遍历动力学
The dipolar Aleppo lattice: Ground state ordering and ergodic dynamics in the absence of vertex frustration
AI总结:
本文提出无顶点阻挫的阿勒颇自旋冰几何结构,通过同步辐射光电子显微镜观测证实其基态有序且无遍历性破缺,表明顶点阻挫是遍历性转变的关键条件。
摘要:
我们引入了阿勒颇自旋冰几何结构,这是抽稀方形冰图案的另一种变体,与先前研究的类似系统不同,该结构不表现出顶点阻挫。利用基于同步加速器的光电子发射显微镜,我们直接观察了热退火后达到的低能态,以及随温度变化的磁矩波动。结果揭示了基态图案的观测以及遍历性破缺动力学的缺失。我们的观测进一步证实了顶点阻挫是遍历性转变出现的重要判据。
英文摘要:
We introduce the Aleppo spin ice geometry, another variation of decimated square ice patterns, which in contrast to similar systems previously studied, does not exhibit vertex frustration. Using synchrotron-based photoemission electron microscopy, we directly visualize low-energy states achieved after thermal annealing, in addition to temperature-dependent moment fluctuations. The results reveal the observation of ground state patterns and the absence of ergodicity-breaking dynamics. Our observations further confirm vertex frustration to be an important criterion for the emergence of ergodicity transitions.
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