Thermodynamic study of 3D XY model and Heisenberg model by analytical method

Hong Li, Tian Iun Chen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


With Variational-Cumulant Expansion method, the specific heat and spontaneous magnetization of 3D classical X Y model and Heisenberg model are calculated respectively up to the 5th and 4th order. The variational parameter is determined both by the Main Value method and by the accumulation point method. It is shown that the specific heat curve and the magnetization curve obtained by the accumulation point method are in better agreement with the MC results. The critical point Tc and critical exponent β* are also calculated for the XY model.

Original languageEnglish (US)
Pages (from-to)283-287
Number of pages5
JournalZeitschrift fur Physik B-Condensed Matter
Issue number2
StatePublished - Jun 1996
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


Dive into the research topics of 'Thermodynamic study of 3D XY model and Heisenberg model by analytical method'. Together they form a unique fingerprint.

Cite this