Spin gap in a spiral staircase model

M. N. Kiselev, D. N. Aristov, K. Kikoin

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We investigate the formation of spin gap in one-dimensional models characterized by the groups with hidden symmetries. We introduce a new class of Hamiltonians for description of spin staircases - the spin systems intermediate between 2-leg ladders and S=1 spin chains. The spin exchange anisotropy along legs is described by the angle of spiral twist. The properties of a special case of spin rotator chain (SRC) corresponding to a flat 1-leg ladder is considered by means of fermionization approach based on Jordan-Wigner transformation. The influence of dynamical hidden symmetries on the scaling properties of the spin gap is discussed.

Original languageEnglish
Pages (from-to)1406-1408
Number of pages3
JournalPhysica B: Condensed Matter
Volume359-361
Issue numberSPEC. ISS.
DOIs
StatePublished - 30 Apr 2005

Keywords

  • Quantum antiferromagnetism
  • Quantum liquids
  • Spin chains

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