On the weak confinement of kinks in the one-dimensional quantum ferromagnet CoNb2O6

S. B. Rutkevich

doi:10.1088/1742-5468/2010/07/P07015

On the weak confinement of kinks in the one-dimensional quantum ferromagnet CoNb2O6

Statistical Mechanics 2015-03-13 v2 Strongly Correlated Electrons

Authors: S. B. Rutkevich

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Abstract

In a recent paper Coldea et al (2010 Science {\bf 327} 177) report observation of the weak confinement of kinks in the Ising spin chain ferromagnet CoNb2O6 at low temperatures. To interpret the entire spectra of magnetic excitations measured via neutron scattering, they introduce a phenomenological model, which takes into account only the two-kink configurations of the spin chain. We present the exact solution of this model. The explicit expressions for the two-kink bound-state energy spectra and for the relative intensities of neutron scattering on these magnetic modes are obtained in terms of the Bessel function.

Keywords

kink confinement Ising spin chain CoNb2O6 neutron scattering bound-state energy spectrum Bessel function

Cite

@article{arxiv.1003.5654,
  title  = {On the weak confinement of kinks in the one-dimensional quantum ferromagnet CoNb2O6},
  author = {S. B. Rutkevich},
  journal= {arXiv preprint arXiv:1003.5654},
  year   = {2015}
}

Comments

18 pages, 9 figures; v2: figures 1,3,4 replaced, few misprints corrected

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