论文标题
人造自旋冰中的现场诱导的磁性血浆
Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
论文作者
论文摘要
人工旋转的旋转冰（ASIS）正在相互作用的光刻定义的纳米磁体，其中可以故意设计新颖的挫败磁相。 ASIS中基本激发的关键突发描述是磁性单极 - 移动准颗粒，具有有效的磁性电荷。在这里，我们证明了原型平方ASI晶格可以在其磁相图的特定区域，移动磁单波的高密度等离子体状态。通过被动地“聆听”热平衡中的自发单子噪声，我们揭示了它们的固有动力学，并表明单极动力学在等离子体相中最小相关（即最扩散）。这些结果为具有场合可调密度和动态特性的按需单极式制度打开了大门，从而提供了一种新的范式，以探测合成物质中有效磁性电荷物理的物理。
Artificial spin ices (ASIs) are interacting arrays of lithographically-defined nanomagnets in which novel frustrated magnetic phases can be intentionally designed. A key emergent description of fundamental excitations in ASIs is that of magnetic monopoles -- mobile quasiparticles that carry an effective magnetic charge. Here we demonstrate that the archetypal square ASI lattice can host, in specific regions of its magnetic phase diagram, high-density plasma-like regimes of mobile magnetic monopoles. By passively "listening" to spontaneous monopole noise in thermal equilibrium, we reveal their intrinsic dynamics and show that monopole kinetics are minimally correlated (that is, most diffusive) in the plasma phase. These results open the door to on-demand monopole regimes having field-tunable densities and dynamic properties, thereby providing a new paradigm for probing the physics of effective magnetic charges in synthetic matter.
