title: A mononuclear transition metal single-molecule magnet in a nuclear spin-free ligand environment.
abstract: The high-spin pseudotetrahedral complex [Co(C3S5)2](2-) exhibits slow magnetic relaxation in the absence of an applied dc magnetic field, one of a small number of mononuclear complexes to display this property. Fits to low-temperature magnetization data indicate that this single-molecule magnet possesses a very large and negative axial zero-field splitting and small rhombicity. The presence of single-molecule magnet behavior in a zero-nuclear spin ligand field offers the opportunity to investigate the potential for this molecule to be a qubit, the smallest unit of a quantum information processing (QIP) system. However, simulations of electron paramagnetic resonance (EPR) spectra and the absence of EPR spectra demonstrate that this molecule is unsuitable as a qubit due to the same factors that promote single molecule magnet behavior. We discuss the influence of rhombic and axial zero-field splitting on QIP applications and the implications for future molecular qubit syntheses.
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Majed S
authors.initials: MS
authors.lastname: Fataftah
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Zadrozny
authors.forename: Dylan M
authors.initials: DM
authors.lastname: Rogers
authors.forename: Danna E
authors.initials: DE
authors.lastname: Freedman