Helicity modulus and vortex density in the two-dimensional easy-plane Heisenberg model on a square lattice

Kyu Won Lee, Cheol Eui Lee, In Mook Kim

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6 Citations (Scopus)


We have studied the two-dimensional easy-plane Heisenberg model by using a Monte Carlo simulation. The helicity modulus and the vortex density were calculated. The Kosterlitz-Thouless transition temperature obtained from the helicity modulus was consistent with previous results obtained using different methods. The energy required to create a bound pair of vortices shows an anisotropy dependence similar to that of the Kosterlitz-Thouless transition temperature.

Original languageEnglish
Pages (from-to)95-98
Number of pages4
JournalSolid State Communications
Issue number1-2
Publication statusPublished - 2005 Jul 1



  • D. Phase transitions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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