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When the RG method is extended to finite temperatures, without any additional assumptions, we find anomalous results for S >= 1. These results lead us to conclude that the perturbative scheme is not adequate to study random chains with S >= 1. Therefore a random singlet phase in its more restrictive definition is only assured for spin-1/2 chains."},{"label":"DOI","value":"10.1103/PhysRevB.63.052414"},{"label":"Volume","value":"63"},{"label":"Publication Date","value":"D:00 M:00 Y:2001"},{"label":"Publication Information","value":"Copyright 2001 American Physical Society"}],"description":"Breakdown of the perturbative renormalization group for S >= 1 random antiferromagnetic spin chains","sequences":[{"@type":"sc:Sequence","canvases":[{"@id":"https://iiif.quartexcollections.com/portland/iiif/80f52755-4617-4162-8aab-a034471777c7/canvas/_1","@type":"sc:Canvas","label":"Breakdown of the perturbative renormalization group for S -= 1 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