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

Pham Thi Thanh Nga; Nguyen Toan Thang

doi:10.15625/0868-3166/29/2/13508

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.

IEEE

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Vol. 29 No. 2 (2019)

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