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

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Authors
Rachel, S.
Thomale, R.
Fuehringer, M.
Schmitteckert, P.
Greiter, M.
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Abstract
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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.
Comment: 4 pages, 3 figures
Keywords
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Statistical Mechanics
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