Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session G55: 1D Magnetism
11:30 AM–2:18 PM,
Tuesday, March 7, 2023
Room: Room 305
Sponsoring
Unit:
GMAG
Chair: Daniel Pajerowski, Oak Ridge National Lab
Abstract: G55.00005 : Critical Low-Energy Spin Dynamics in the BEC-Type Antiferromagnets
12:42 PM–1:18 PM
Presenter:
Mladen Horvatic
(LNCMI-CNRS (Grenoble High Magnetic Field Laboratory))
Author:
Mladen Horvatic
(LNCMI-CNRS (Grenoble High Magnetic Field Laboratory))
We now focus on describing spin fluctuations in quasi-2D systems, where our results in Ba2CuSi2O6Cl2 suggest that the 1/T1 data could provide a clear signature for the system’s effective dimensionality. However, we find only a partial agreement with the Quantum Monte Carlo (QMC) simulations, leaving the subject open to further investigation.
Finally, from the 1/T1 data recorded precisely at the saturation field in the SrZnVO(PO4)2 compound we learn that the theoretically predicted quantum critical T3/4 dependence cannot be experimentally accessed in any compound, because the convergence into this low-T limit is too slow and the theoretical prediction is no longer valid when the BEC transition is too close. Nevertheless, the complete description provides correct semi-quantitative account of the data [2].
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