Strongly disordered spin ladders

R. Mélin, Y. C. Lin, P. Lajkó, H. Rieger, F. Iglói

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of quenched disorder on the low-energy properties of various antiferromagnetic spin-ladder models is studied by a numerical strong disorder renormalization-group method and by density-matrix renormalization. For strong enough disorder the originally gapped phases with finite topological or dimer order become gapless. In these quantum Griffiths phases the scaling of the energy, as well as the singularities in the dynamical quantities, are characterized by a finite dynamical exponent, z, which varies with the strength of disorder. At the phase boundaries, separating topologically distinct Griffiths phases the singular behavior of the disordered ladders is generally controlled by an infinite randomness fixed point.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number10
DOIs
Publication statusPublished - Jan 1 2002

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Ladders
ladders
disorders
Phase boundaries
Dimers
renormalization group methods
dimers
exponents
scaling
energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Strongly disordered spin ladders. / Mélin, R.; Lin, Y. C.; Lajkó, P.; Rieger, H.; Iglói, F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 10, 01.01.2002, p. 1-10.

Research output: Contribution to journalArticle

Mélin, R. ; Lin, Y. C. ; Lajkó, P. ; Rieger, H. ; Iglói, F. / Strongly disordered spin ladders. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 10. pp. 1-10.
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