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Czechoslovak Journal of Physics

, Volume 52, Supplement 1, pp A277–A280 | Cite as

Quantum spin chains with regularly alternating bonds and fields

  • Oleg Derzhko
Article

Abstract

We consider the spin-1/2 XY chain in a transverse field with regularly varying exchange interactions and on-site fields. In two limiting cases of the isotropic (XX) and extremely anisotropic (Ising) exchange interaction the thermodynamic quantities are calculated rigorously with the help of continued fractions. We discuss peculiarities of the low-temperature magnetic properties and a possibility of the spin-Peierls instability.

PACS

75.10.-b 

Key words

XX chain Ising chain in a transverse field regularly alternating spin chain 

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Copyright information

© Institute of Physics, Academy of Sciences of the Czech Republic 2002

Authors and Affiliations

  • Oleg Derzhko
    • 1
  1. 1.Institute for Condensed Matter PhysicsUkraine

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