Assymetric Berry phase in molecular magnets

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, and D. N. Hendrickson
Phys. Rev. Lett. 106, 227201 (2011)

Modulation of the QTM probabilities for resonances k = 0 (a) and k = 1 (b) as a function of HT applied at
different angles, within the hard plane of the Mn4-Bet SMM.