Quantum tunneling of magnetization in trigonal single-molecule magnets
Abbreviated Journal Title
Phys. Rev. B
INTERFERENCE; Physics, Condensed Matter
We consider quantum tunneling of magnetization (QTM) in single-molecule magnets (SMMs) possessing idealized C-3 symmetry. We do so by mapping the spectrum of a Mn-3(III) SMM obtained via diagonalization of a multispin (three s = 2 spins) Hamiltonian onto that of a giant-spin model with spin S = 6. Rotation of the easy axes of the Mn-III atoms away from the C-3 axis leads to the emergence of the (O) over cap (3)(4) ( 1/2[(S) over cap (z), (S) over cap (3)(+) + (S) over cap (3)(-)]) operator in the giant-spin model. This unfreezes odd-k QTM resonances and generates threefold patterns of Berry-phase interference minima in all resonances, including k = 0, which shifts from zero longitudinal field.
Physical Review B
"Quantum tunneling of magnetization in trigonal single-molecule magnets" (2012). Faculty Bibliography 2010s. 2953.