Spinon confinement and the Haldane gap in SU(n) spin chains

Details Spinon confinement and the Haldane gap in SU(n) spin chains Spinon confinement and the Haldane gap in SU(n) spin chains

2009-04-24

arxiv.org/abs/0904.3882v2

Phys. Rev. B 80, 180420(R) (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

We use extensive DMRG calculations to show that a classification of SU(n)
spin chains with regard to the existence of spinon confinement and hence a
Haldane gap obtained previously for valence bond solid models applies to SU(n)
Heisenberg chains as well. In particular, we observe spinon confinement due to
a next-nearest neighbor interaction in the SU(4) representation 10 spin chain.

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