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arXiv · 1106.0258

Asymmetric Berry-Phase Interference Patterns in a Single-Molecule Magnet

H. M. Quddusi·J. Liu·S. Singh·K. J. Heroux·E. del Barco·S. Hill·D. N. Hendrickson
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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.

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H. M. Quddusi, J. Liu, S. Singh, K. J. Heroux, E. del Barco, S. Hill, D. N. Hendrickson. 2011-06-01. Asymmetric Berry-Phase Interference Patterns in a Single-Molecule Magnet. https://doi.org/10.1103/physrevlett.106.227201

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