Ground-State Energy of Biquadratic Spin Systems (S=3/2) in the (1/z)^1-Approximation

• Authors: E. Błaszczak , J. Aksamit , A. Franek
• Languages of publication: EN

Abstracts

EN

Corrections to the molecular-field ground-state energies of the Heisenberg model with isotropic biquadratic interactions (spin S=3/2) are calculated in the (1/z)^1-approximation using the diagrammatic technique based on the Wick reduction theorem (z is the number of spins interacting with any given spin). The present results for the antiferri- and antiferromagnetic phases complete the previously obtained data for the antiquadrupolar, ferri- and ferromagnetic phases. From among the boundaries between different ground states only that between the antiferri- and antiferromagnetic phases is shifted with respect to its molecular-field value.

Keywords

EN

75.10.Jm; 75.30.Ds; 75.30.Et; 75.50.Ee

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 75.50.Ee: Antiferromagnetics
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Journal: Acta Physica Polonica A
• Year: 2003
• Volume: 103
• Issue: 4
• Pages: 403-414

Dates

published

2003-04

received

2002-11-12

Contributors

author

E. Błaszczak

• Department of Medical Biophysics, Medical University of Silesia, Medyków 18, 40-752 Katowice, Poland

author

J. Aksamit

• Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland

author

A. Franek

• Department of Medical Biophysics, Medical University of Silesia, Medyków 18, 40-752 Katowice, Poland

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Identifiers

DOI

10.12693/APhysPolA.103.403