Magnetic Order in Heisenberg Models on Non-Bravais Lattice: Popov-Fedotov Functional Method

Pham Thi Thanh Nga, Nguyen Toan Thang
Author affiliations


  • Pham Thi Thanh Nga Thuy loi University, 175 Tay Son, Hanoi
  • Nguyen Toan Thang Institute of Physics, VAST



Popov - Fedotov trick, functional integral, Heisenberg model, non-Bravais lattice


We study magnetic properties of ordered phase in Heisenberg model on a non-Bravais lattice by means of Popov - Fedotov trick, which takes into account a rigorous constraint of a single occupancy. We derive magnetization and free energy using sadle point approximation in the functional integral formalism. We illustrate the application of the Popov -- Fedotov approach to the Heisenberg antiferromagnet on a honeycomb lattice.


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How to Cite

P. T. T. Nga and N. T. Thang, Magnetic Order in Heisenberg Models on Non-Bravais Lattice: Popov-Fedotov Functional Method, Comm. Phys. 29 (2019) 119. DOI:




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