Three-leaf quantum interference clovers in a trigonal single-molecule magnet.
Three-leaf quantum interference clovers in a trigonal single-molecule magnet.
复制标题
三角形单分子磁体中的三叶量子干涉三叶草。
DOI：
10.1103/physrevlett.113.087201
复制
发表时间：
2014
影响因子：
8.6
通讯作者：
Atkinson JH
中科院分区：
文献类型：
--
作者：
Atkinson JH
我们报道了一种单分子磁体，其中三个锰离子的空间排列及其自旋轨道耦合张量取向导致磁化隧道速率的三倍角调制和量子干涉模式，模拟三叶草的形式。虽然在三角分子对称磁化共振的所有量子隧穿中都有预期，但三倍调制只出现在施加纵向磁场的共振中（即共振数）。在共振处观察到的六倍横向场调制是自旋轨道耦合能量景观三倍波纹的直接结果，产生了一个有效的纵向场，在横向场存在的情况下改变了共振条件。观测结果允许局部自旋轨道相互作用的三角畸变与组成离子的空间配置之间的联系，这一发现可以外推到自旋轨道耦合起重要作用的其他系统中。
We report on a single-molecule magnet where the spatial arrangement of three manganese ions and their spin-orbit coupling tensor orientations result in threefold angular modulations of the magnetization tunneling rates and quantum interference patterns that mimic the form of a three-leaf clover. Although expected in all quantum tunneling of magnetization resonances for a trigonal molecular symmetry, the threefold modulation only appears at resonances for which a longitudinal magnetic field is applied (i.e., resonance numbers). A sixfold transverse field modulation observed at resonancemanifests as a direct consequence of a threefold corrugation of the spin-orbit coupling energy landscape, creating an effective longitudinal field which varies the resonance condition in the presence of a transverse field. The observations allow for an association between the trigonal distortion of the local spin-orbit interactions and the spatial disposition of the constituent ions, a finding that can be extrapolated to other systems where spin-orbit coupling plays a significant role.