Three-Leaf Quantum Interference Clovers in a Trigonal Single-Molecule Magnet
Abbreviated Journal Title
Phys. Rev. Lett.
SPIN; MAGNETIZATION; Physics, Multidisciplinary
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 vertical bar k vertical bar > 0). A sixfold transverse field modulation observed at resonance k = 0 manifests 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.
Physical Review Letters
"Three-Leaf Quantum Interference Clovers in a Trigonal Single-Molecule Magnet" (2014). Faculty Bibliography 2010s. 5004.