论文标题
Kekulene分子中的涡旋
Vortices in Kekulene Molecules
论文作者
论文摘要
Kekulene是一种芳香的碳氢化合物，其配方C48H24以封闭的超级环的形状排列，如图2所示。它由带有48 C原子的Sublatice组成，带有旋转5/2和24个带有旋转氢的氢Sublattice 2。在此通信中，我们使用Monte Carlo Simulations在kne carlo simulation中确定磁性结构（kekule in in kekule in in kekule ins kekule ins in kekule）（ D/J）。我们的结果表明，在低温下，有两个机制在2.5 <ΔCross<3.0时分开。对于Δ<ΔCross，基态具有独特的涡旋构型。在区域中，出现了涡流 - 抗逆转器（V-av）的Δ>ΔCross排列。随着温度的增加，涡流结构障碍，而小振荡接管了。对合成该分子的重要性的重要性是建造大小的实际平面结构的可能性至少比早期提出的或所提议的或角纳米植物小10倍。值得一提的是，Kekulene是一种具有原子厚度的平面结构，与其他纳米磁结构相比，这是一个很大的优势。
Kekulene is an aromatic hydrocarbon with formula C48H24 arranged in the shape of a closed super-ring as shown in Fig. 2. It consists of a sublattice with 48 C atoms with spin 5/2 and a 24 hydrogen sublattice with spin 2. In this communication, we use Monte Carlo simulations to determine the magnetic structures present in Kekulene for several temperatures (T) and dipole anisotropies (δ = D/J). Our results show that there are two regimes at low temperature separated by a crossover at 2.5 < δcross < 3.0. For δ < δcross the ground state has a unique vortex configuration. In the region δ > δcross arrangements of vortices-antivortices (V-AV) appears. As temperature raises the vortex structure disorders and small oscillations take over. The importance on synthesizing this molecule grounds in the possibility of building real planar structures of sizes at least 10 times smaller than the earlier proposed permalloy nanodots. It is worthy to mention that Kekulene is a planar structure with atomic thickness, which is a great advantage compared with other nanomagnetic structures.
