Supermagnonic Propagation in Two-Dimensional Antiferromagnets.
Phys Rev Lett
; 127(9): 097202, 2021 Aug 27.
Article
en En
| MEDLINE
| ID: mdl-34506161
ABSTRACT
We investigate the propagation of magnons after ultrashort perturbations of the exchange interaction in the prototype two-dimensional Heisenberg antiferromagnet. Using the recently proposed neural quantum states, we predict highly anisotropic spreading in space constrained by the symmetry of the perturbation. Interestingly, the propagation speed at the shortest length scale and timescale is up to 40% higher than the highest magnon velocity. We argue that the enhancement stems from extraordinary strong magnon-magnon interactions, suggesting new avenues for manipulating information transfer on ultrashort length scales and timescales.
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MEDLINE
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Phys Rev Lett
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2021
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Article
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Países Bajos