Quantum phase interference and spin parity in Mn12 single-molecule magnets
W. Wernsdorfer, N. E. Chakov, and G. Christou
TL;DR
This paper investigates quantum phase interference effects in Mn12 molecular nanomagnets, revealing how spin parity influences tunneling phenomena and demonstrating topological quantum effects in single-molecule magnets.
Contribution
It provides experimental evidence of spin-parity dependent quantum interference in Mn12 nanomagnets, highlighting the role of topological phases in magnetic tunneling.
Findings
Oscillations of tunnel probability with magnetic field due to quantum interference
Difference in tunneling behavior between integer and half-integer spins
Confirmation of topological quantum phase effects in molecular magnets
Abstract
Magnetization measurements of Mn12 molecular nanomagnets with spin ground states of S = 10 and S = 19/2 showresonance 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. Spin-parity dependent tunneling is established by comparing the quantum phase interference of integer and half-integer spin systems.
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