Two-dimensional Heisenberg antiferromagnet in a transverse field

Abstract

We investigate the magnetic reorientation in a two-dimensional anisotropic antiferromagnet due to a transverse magnetic field. Using a many-body Green's function approach, we show that the magnetization component perpendicular to the applied field (and along the easy-axis of the antiferromagnet) initially increases with increasing field strength. We show that this unexpected result arises from the suppression of quantum and thermal fluctuations in the antiferromagnet. Above the Néel temperature, this effect leads to a reappearance of a magnetic moment along the easy-axis.

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Cited by in corpus (9)

• Continuous Symmetry Breaking in a Two-dimensional Rydberg Array
• Magnetic Catalysis in Antiferromagnetic Films
• Magnons in a two dimensional transverse field XXZ model
• Anisotropic bulk and planar Heisenberg ferromagnets in uniform, arbitrarily oriented magnetic fields
• Antiferromagnetism in two-dimensional t-J model: pseudospin representation
• Green's function theory for spin-1/2 ferromagnets with an easy-plane exchange anisotropy
• The effect of transverse magnetic correlations on a coupled order parameter: shifted transition temperatures and thermal hysteresis
• Spectral characteristics of the antiferromagnetic spin-1/2 Heisenberg model on the square lattice in a magnetic field
• Effects of frustration and Dzyaloshinskii-Moriya interaction on the spin-1/2 anisotropic Heisenberg antiferromagnet with the application to La2CuO4