A new effective field theory for easy-plane anisotropic antiferromagnets in a magnetic field captures pseudo-Goldstone gaps, a first-order spin-flop transition, and a nontrivial quantization in the anisotropy-dominated phase.
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An EFT for anisotropic anti-ferromagnets: gapped Goldstones, pseudo-Goldstones, and phase transitions
A new effective field theory for easy-plane anisotropic antiferromagnets in a magnetic field captures pseudo-Goldstone gaps, a first-order spin-flop transition, and a nontrivial quantization in the anisotropy-dominated phase.