Schmidt KP (2003)
Publication Status: Published
Publication Type: Journal article
Publication year: 2003
Publisher: AMER PHYSICAL SOC
Book Volume: 90
Journal Issue: 22
DOI: 10.1103/PhysRevLett.90.227204
The transition from dimerized to uniform phases is studied in terms of spectral weights for spin chains using continuous unitary transformations. The spectral weights in the S=1 channel are computed perturbatively around the limit of strong dimerization. We find that the spectral weight is concentrated mainly in the subspaces with a small number of elementary triplets (triplons), even for vanishing dimerization. So, besides spinons, triplons may be used as elementary excitations in spin chains. We conclude that there is no necessity to use fractional excitations in low-dimensional, undoped, or doped quantum antiferromagnets.
APA:
Schmidt, K.P. (2003). Excitations in one-dimensional S = 1/2 quantum antiferromagnets. Physical Review Letters, 90(22). https://doi.org/10.1103/PhysRevLett.90.227204
MLA:
Schmidt, Kai Phillip. "Excitations in one-dimensional S = 1/2 quantum antiferromagnets." Physical Review Letters 90.22 (2003).
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