可调有限尺寸自旋阵列中吸引子的原子-原子构造
Atom-by-atom construction of attractors in a tunable finite size spin array
摘要：
我们证明了通过RKKY交换耦合的二维有限和周期性的伊辛自旋阵列可以表现出三种不同的磁性状态：（1）传统的铁磁制度，（2）玻璃状制度，和（3）新的多阱制度。这些磁制度可以通过一个类似门的参数，即晶格常数和振荡相互作用波长之间的比率进行调谐。我们的各种磁制度的特点，量化的低能量状态，老化弛豫动力学和标度行为的分布。这种玻璃态和多阱态的行为是由振荡的长程交换相互作用的竞争特性引起的。多井结构具有多个吸引子，每个吸引子具有相当大的吸引盆地。这可能会打开这种原子阵列作为关联存储器的可能应用。
英文摘要：
We demonstrate that a two-dimensional finite and periodic array of Ising spins coupled via RKKY-like exchange can exhibit tunable magnetic states ranging from three distinct magnetic regimes: (1) a conventional ferromagnetic regime, (2) a glass-like regime, and (3) a new multi-well regime. These magnetic regimes can be tuned by one gate-like parameter, namely the ratio between the lattice constant and the oscillating interaction wavelength. We characterize the various magnetic regimes, quantifying the distribution of low energy states, aging relaxation dynamics, and scaling behavior. The glassy and multi-well behavior results from the competing character of the oscillating long-range exchange interactions. The multi-well structure features multiple attractors, each with a sizable basin of attraction. This may open the possible application of such atomic arrays as associative memories.
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