Effects of Frustration and Dzyaloshinskii–Moriya Interaction on the Spin‐1/2 Anisotropic Heisenberg Antiferromagnet with the Application to La2CuO4.

The magnetic properties of the 2D anisotropic antiferromagnetic spin‐1/2 Heisenberg model with Dzyaloshinskii–Moriya interaction and in‐plane frustration are studied. The method of spin Green's functions within the framework of Tyablikov's random‐phase‐approximation decoupling scheme is used to derive expressions for the spin‐wave spectrum, sublattice magnetization, and transition temperature. Based on these expressions, a detailed analysis of the influence of varying values of model parameters on their magnetic properties is conducted. The model is also applied to the high‐Tc superconducting parent compound La2CuO4 and the results compared with available experimental data. [ABSTRACT FROM AUTHOR]