Magnetic Properties of Quantum Square Heisenberg Antiferromagnet with Frustration:  an Auxiliary Fermion Approach

Pham Thi Thanh Nga; Nguyen Toan Thang

doi:10.15625/0868-3166/24/3/5027

Magnetic Properties of Quantum Square Heisenberg Antiferromagnet with Frustration: an Auxiliary Fermion Approach

Pham Thi Thanh Nga, Nguyen Toan Thang

Author affiliations

Authors

Pham Thi Thanh Nga Water Resources University, 175 Tay Son, Hanoi
Nguyen Toan Thang Institute of Physics, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.15625/0868-3166/24/3/5027

Keywords:

functional integral, antiferromagnetic Heisenberg model, square lattice, frustration

Abstract

We study the magnetic ordered phases of the spin \(-\frac{1}{2}\) Heisenberg antiferromagnetic model with nearest \(J_1\) and next nearest neighbor \(J_2\) exchange interactions on the square lattice using fermionic representation of spin operators within Popov-Fedotov approach.The unphysical states are eliminated on each site by introducing an imaginary chemical potential. Working in local coordinate system for every site we investigate the different ordered phases in dependence on exchange parameters. At \(T = 0\) we recover the conventional spin wave results.

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Published

14-10-2014

How to Cite

[1]

P. T. T. Nga and N. T. Thang, Magnetic Properties of Quantum Square Heisenberg Antiferromagnet with Frustration: an Auxiliary Fermion Approach, Comm. Phys. 24 (2014) 193. DOI: https://doi.org/10.15625/0868-3166/24/3/5027.

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Issue

Vol. 24 No. 3 (2014)

Section

Papers

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