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DTSTART;TZID=Europe/Paris:20260611T110000
DTEND;TZID=Europe/Paris:20260611T180000
DTSTAMP:20260527T153500
UID:MEC-312f1ba2a72318edaaa995a67835fad5@lps.u-psud.fr
CREATED:20260527
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SUMMARY:Sylvain Capponi : Variational study of magnetization plateaus in the spin-1/2 kagome Heisenberg antiferromagnet
DESCRIPTION:\nSylvain Capponi, LPT Toulouse\n\n\n\n“Variational study of magnetization plateaus in the spin-1/2 kagome Heisenberg antiferromagnet”\n\n\n\nContact: andrej.meszaros@universite-paris-saclay.fr ( mailto:andrej.meszaros@universite-paris-saclay.fr )\n\n\n\nLe résumé :\n\n\n\nWe analyze the magnetization curve of the spin-1/2 kagome Heisenberg model in a magnetic field. Using state-of-the-art variational wavefunctions based on neural networks, we confirm the presence of robust magnetization plateaus at m=1/3, 5/9 and 7/9 of the saturation value, stabilized by a spontaneous symmetry breaking of lattice translations with a David-star unit cell.Regarding the more challenging m=1/9 plateau, we find two competing valence bond crystals depending on the system size, both breaking translation as well as point group symmetries and with a larger 3×3 unit cell.\n\n\n\nReference:  Andreas Raikos, Sylvain Capponi, Fabien Alet, arXiv:2602.12998 \n
URL:https://www.lps.u-psud.fr/en/events/sylvain-capponi-variational-study-of-magnetization-plateaus-in-the-spin-1-2-kagome-heisenberg-antiferromagnet/
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