Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session J46: Single Molecule Magnets
2:30 PM–5:30 PM,
Tuesday, March 3, 2020
Sponsoring Unit: GMAG
Chair: Selvan Demir, Michigan State Univ
Abstract: J46.00001 : The power of typicality applied to magnetic molecules and low-dimensional quantum spin systems*
systems with unprecedented accuracy. This way quantum critical as well as magnetocaloric properties of large cyclic clusters could be elucidated. For the kagome lattice antiferromagnet it became possible to model a lattice of size N=42 (!) quasi exactly. This enabled us to study in particular that the low-lying density of singlet states moves up in energy contrary to common believe. In addition, we could demonstrate for lattices up to 72 sites that magnon crystallization occurs slightly below the saturation field, an effect driven by the existance of flat energy bands.
 A. Baniodeh et al., High spin cycles: topping the spin record for a single molecule verging on quantum criticality, npj Quantum Materials 3,10 (2018)
 J. Schnack, J. Schulenburg, J. Richter, Magnetism of the N=42 kagome lattice antiferromagnet, Phys. Rev. B 98, 094423 (2018)
 J. Schnack, J. Schulenburg, A. Honecker, J. Richter, Magnon crystallization in the kagome lattice antiferromagnet, arXiv:1910.10448
*Computing time at the Leibniz Center in Garching (Germany) is gratefully acknowledged.
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