Response of finite spin-(formula presented) heisenberg chains to local perturbations

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5 Citations (Scopus)

Abstract

We consider the properties of finite isotropic antiferromagnetic Heisenberg chains with (Formula presented) spins when a weak magnetic field is applied on a few sites, using White’s density-matrix renormalization-group method. For the (Formula presented) chain there exists only one length scale in the system which determines the behavior of the one- and two-point correlation functions both around the local perturbation and near the free boundary. For the critical half-odd-integer spin cases the exponent of the spin-spin correlation function was found to be (Formula presented) and the exponent of the decay of the site magnetization around the perturbed site is (Formula presented) Close to a free boundary, however, the behavior is completely different for (Formula presented) and (Formula presented)

Original languageEnglish
Pages (from-to)3606-3611
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number5
DOIs
Publication statusPublished - Jan 1 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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