Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.087201
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Funding
- National Science Foundation [DMR 0747587]
- EPSRC
- Engineering and Physical Sciences Research Council [EP/L010615/1, EP/H006737/1, EP/H011234/1] Funding Source: researchfish
- EPSRC [EP/L010615/1, EP/H006737/1, EP/H011234/1] Funding Source: UKRI
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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.
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