Doping of a Spin-1 Chain: An Integrable Model

Frahm, Holger; Pfannmüller, M.P.; Tsvelik, A.M.

Original version

Frahm, H.; Pfannmüller, M.P.; Tsvelik, A.M.: Doping of a Spin-1 Chain: An Integrable Model. In: Physical Review Letters 81 (1998), Nr. 10, S. 2116-2119. DOI: https://doi.org/10.1103/PhysRevLett.81.2116

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/5084

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Abstract:
An exactly soluble model describing a spin S=1 antiferromagnetic chain doped with mobile S=1/2 carriers is constructed. In its continuum limit the undoped state is described by three gapless Majorana fermions composing the SU(2) triplet. Doping adds a scalar charge field and a singlet Majorana fermion with different velocity. We argue that this mode survives when the Haldane gap is added.
License of this version:	Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Publication type:	Article
Publishing status:	publishedVersion
Publication date:	1998
Keywords english:	antiferromagnetic chain
DDC:	530 \| Physik