Spectral characteristics of the antiferromagnetic spin-1/2 Heisenberg model on the square lattice in a magnetic field

We predict that spin-waves in an ordered square quantum antiferromagnet in a transverse magnetic field (h) may demonstrate three modes of spin excitations. Starting from the self-consistent rotation-invariant Green's function method, a new mean-field theory is constructed for h not equal to 0....

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Veröffentlicht in:	arXiv.org 2020-03
Hauptverfasser:	Savchenkov, P S, Barabanov, A F
Format:	Artikel
Sprache:	eng
Schlagworte:	Antiferromagnetism Excitation Green's functions Heisenberg theory Inelastic scattering Lattice vibration Magnetic fields Magnetism Mean field theory Neutron scattering Neutrons Physics - Strongly Correlated Electrons Statistical models
Online-Zugang:	Volltext
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