Roton Minimum as a Fingerprint of Magnon-Higgs Scattering in Ordered Quantum Antiferromagnets
Powalski M, Uhrig GS, Schmidt KP (2015)
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Journal
Publisher: AMER PHYSICAL SOC
Book Volume: 115
Journal Issue: 20
DOI: 10.1103/PhysRevLett.115.207202
Abstract
A quantitative description of magnons in long-range ordered quantum antiferromagnets is presented which is consistent from low to high energies. It is illustrated for the generic S = 1/2 Heisenberg model on the square lattice. The approach is based on a continuous similarity transformation in momentum space using the scaling dimension as the truncation criterion. Evidence is found for significant magnon-magnon attraction inducing a Higgs resonance. The high-energy roton minimum in the magnon dispersion appears to be induced by strong magnon-Higgs scattering.
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APA:
Powalski, M., Uhrig, G.S., & Schmidt, K.P. (2015). Roton Minimum as a Fingerprint of Magnon-Higgs Scattering in Ordered Quantum Antiferromagnets. Physical Review Letters, 115(20). https://doi.org/10.1103/PhysRevLett.115.207202
MLA:
Powalski, M., G. S. Uhrig, and Kai Phillip Schmidt. "Roton Minimum as a Fingerprint of Magnon-Higgs Scattering in Ordered Quantum Antiferromagnets." Physical Review Letters 115.20 (2015).
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