Title: Disorder-induced phases in higher-spin antiferromagnetic Heisenberg chains
Authors: Carlon, Enrico ×
Lajko, P
Rieger, H
Igloi, F #
Issue Date: Apr-2004
Publisher: American physical soc
Series Title: Physical review b vol:69 issue:14 pages:-
Article number: 0
Abstract: Extensive density-matrix renormalization-group calculations for spin S=1/2 and S=3/2 disordered antiferromagnetic Heisenberg chains show a rather distinct behavior in the two cases. While at sufficiently strong disorder both systems are in a random singlet phase, we show that weak disorder is an irrelevant perturbation for the S=3/2 chain, contrary to what expected from a naive application of the Harris criterion. The observed irrelevance is attributed to the presence of a new correlation length due to enhanced end-to-end correlations. This phenomenon is expected to occur for all half-integer S>1/2 chains. A possible phase diagram of the chain for generic S is also discussed.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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