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

Pham Thi Thanh Nga, Nguyen Toan Thang
Author affiliations

Authors

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

DOI:

https://doi.org/10.15625/0868-3166/29/2/13508

Keywords:

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

Abstract

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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Published

14-05-2019

How to Cite

[1]
P. T. T. Nga and N. T. Thang, “Magnetic Order in Heisenberg Models on Non-Bravais Lattice: Popov-Fedotov Functional Method”, Comm. Phys., vol. 29, no. 2, p. 119, May 2019.

Issue

Vol. 29 No. 2 (2019)

Section

Papers

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