电偶极液体中出现的反常场敏感自旋软物质
Anomalously field-susceptible spin soft-matter emerging in an electric-dipole liquid candidate
摘要：
多体系统中的相互作用产生了各种奇异相，其中类液体态由于挫折而无法有序是人们非常感兴趣的。最近，一个有机系统与各向异性的三角形晶格的分子二聚体已被建议主机偶极液体所产生的内二聚体电荷不平衡的不稳定性，可能提供了一个前所未有的阶段的自旋自由度。在这里，我们表明，一个非凡的无序（解冻）自旋态具有软物质的时空特性是在这个系统中得到证实。$^1$ H NMR谱和磁化强度测量表明，巨大的，交错的时刻是非线性和不均匀的诱导磁场，而在零场极限的时刻消失。核磁共振弛豫速率的分析表明，在低温下的时刻波动的特征频率减慢到低于MHz。中尺度动力学相关长度的不均匀性，局部相关性和缓慢的动力学表明一种新的挫折驱动的自旋团簇化。
英文摘要：
Mutual interactions in many-body systems bring about a variety of exotic phases, among which liquid-like states failing to order due to frustration are of keen interest. Recently, an organic system with an anisotropic triangular lattice of molecular dimers has been suggested to host a dipole liquid arising from intradimer charge-imbalance instability, possibly offering an unprecedented stage for the spin degrees of freedom. Here we show that an extraordinary unordered(unfrozen) spin state having soft-matter-like spatiotemporal characteristics is substantiated in this system. $^1$H NMR spectra and magnetization measurements indicate that gigantic, staggered moments are non-linearly and inhomogeneously induced by magnetic field whereas the moments vanish in the zero-field limit. The analysis of the NMR relaxation rate signifies that the moments fluctuate at a characteristic frequency slowing down to below MHz at low temperatures. The inhomogeneity, local correlation, and slow dynamics indicative of middle-scale dynamical correlation length suggest a novel frustration-driven spin clusterization.
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