Asymmetric Berry-Phase Interference Patterns in a Single-Molecule Magnet
arXiv:1106.0258 · doi:10.1103/PhysRevLett.106.227201
Abstract
A Mn4 single-molecule magnet displays asymmetric Berry-phase interference patterns in the transverse-field (HT) dependence of the magnetization tunneling probability when a longitudinal field (HL) is present, contrary to symmetric patterns observed for HL=0. Reversal of HL results in a reflection of the transverse-field asymmetry about HT=0, as expected on the basis of the time-reversal invariance of the spin-orbit Hamiltonian which is responsible for the tunneling oscillations. A fascinating motion of Berry-phase minima within the transverse-field magnitude-direction phase space results from a competition between noncollinear magnetoanisotropy tensors at the two distinct Mn sites.
4 double-column pages
References in corpus (4)
- Magnetic Quantum Tunneling: Insights from Simple Molecule-Based Magnets
- Influence of antisymmetric exchange interaction on quantum tunneling of magnetization in a dimeric molecular magnet Mn6
- Geometric-Phase-Effect Tunnel-Splitting Oscillations in Single-Molecule Magnets with Fourth-Order Anisotropy Induced by Orthorhombic Distortion
- Tunneling and inversion symmetry in single-molecule magnets: the case of the Mn12 wheel molecule