Disorder Strength and Field-Driven Ground State Domain Formation in Artificial Spin Ice: Experiment, Simulation, and Theory
Disorder Strength and Field-Driven Ground State Domain Formation in Artificial Spin Ice: Experiment, Simulation, and Theory
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DOI：
10.1103/physrevlett.109.037203
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发表时间：
2012-07-17
影响因子：
8.6
通讯作者：
Stamps, R. L.
中科院分区：
文献类型：
--
作者：
Budrikis, Zoe;Morgan, J. P.;Stamps, R. L.
淬灭无序影响非平衡系统对驱动的反应。在人工自旋冰的背景下，一个非热系统的几何挫折经典伊辛自旋与双重退化基态，我们给出了实验和数值证据，这种混乱如何洗出边缘效应，并提供了一个估计的无序强度的实验系统。我们分析证明，一个序列的应用领域与固定的振幅是无法驱动系统从饱和状态到其基态。这些结果应该是相关的其他系统中的无序不改变基态的性质。
Quenched disorder affects how nonequilibrium systems respond to driving. In the context of artificial spin ice, an athermal system comprised of geometrically frustrated classical Ising spins with a twofold degenerate ground state, we give experimental and numerical evidence of how such disorder washes out edge effects and provide an estimate of disorder strength in the experimental system. We prove analytically that a sequence of applied fields with fixed amplitude is unable to drive the system to its ground state from a saturated state. These results should be relevant for other systems where disorder does not change the nature of the ground state.