Quantum phase interference (Berry phase) in single-molecule magnets of Mn12

Abstract

Magnetization measurements of a molecular clusters Mn12 with a spin ground state of S = 10 show resonance tunneling at avoided energy level crossings. The observed oscillations of the tunnel probability as a function of the magnetic field applied along the hard anisotropy axis are due to topological quantum phase interference of two tunnel paths of opposite windings. Mn12 is therefore the second molecular clusters presenting quantum phase interference.

3 pages, 4 figures, MMM'01 conference (12-16 Nov.)

References in corpus (17)

• Observation of the distribution of molecular spin states by resonant quantum tunneling of the magnetization
• Nonadiabatic Landau Zener tunneling in Fe_8 molecular nanomagnets
• Nuclear spin driven resonant tunnelling of magnetisation in Mn12 acetate
• Incoherent Zener tunneling and its application to molecular magnets
• Diabolical Points in Magnetic Molecules: An Exactly Solvable Model
• Oscillatory Tunnel Splittings in Spin Systems: A Discrete Wentzel-Kramers-Brillouin Approach
• Quantum Phase Interference for Quantum Tunneling in Spin Systems
• Spin tunneling and topological selection rules for integer spins
• Large transverse field tunnel splittings in the Fe_8 spin Hamiltonian
• Application of the discrete Wentzel-Kramers-Brillouin method to spin tunneling
• Non-Kramers Freezing and Unfreezing of Tunneling in the Biaxial Spin Model
• Diabolical points in the magnetic spectrum of Fe_8 molecules
• Quantum-Classical Phase Transition of Escape rate in Biaxial Spin Particles
• Oscillation of the tunnel splitting in nanospin systems within the particle mapping formalism
• Magnetization quantum tunneling at excited levels for a biaxial spin system in an arbitrarily directed magnetic field
• Phase interference of spin tunneling in an arbitrarily directed magnetic field
• Intermediate spin, Schrödinger cat states and nano-magnets

Cited by in corpus (12)

• Thermal fluctuations of magnetic nanoparticles
• Single-molecule Nanomagnets
• Quantum phase interference and spin parity in Mn12 single-molecule magnets
• Magnetization dynamics in the single-molecule magnet Fe8 under pulsed microwave irradiation
• Influence of the Dzyaloshinskii-Moriya exchange interaction on quantum phase interference of spins
• Spin Tunneling in Magnetic Molecules: Quasisingular Perturbations and Discontinuous SU(2) Instantons
• Quantum interference oscillations of the superparamagnetic blocking in an Fe8 molecular nanomagnet
• Josephson current through a quantum dot coupled to a molecular magnet
• Precision ESR Measurements of Transverse Anisotropy in the Single-molecule Magnet Ni${}_4$
• Direct Spectroscopic Observation of Berry Phase Interference in the Ni${}_4$ Single-Molecule Magnet
• Comment on: Quantum interference of tunnel trajectories between states of different spin length in a dimeric molecular nanomagnet
• Berry-phase effect in single molecule magnets: analytical and numerical results