1988
DOI: 10.1103/physrevb.37.5817
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Antiferromagnetic resonance inLa2xCuO4y

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Cited by 34 publications
(3 citation statements)
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“…The two zone-center modes, which in the physical basis correspond to in-plane and outof-plane excitations, have a gap of 4JS sin φ. For the parameters used above this is ≃ 1.5 meV and ∼ 2.5 meV in La 2 CuO 4 [16,17]. Note, however, that the theory presented here unambiguously predicts that the in-plane and out-of-plane spin-wave gaps should be equal, while experimentally these gaps have different values.…”
Section: )mentioning
confidence: 50%
See 1 more Smart Citation
“…The two zone-center modes, which in the physical basis correspond to in-plane and outof-plane excitations, have a gap of 4JS sin φ. For the parameters used above this is ≃ 1.5 meV and ∼ 2.5 meV in La 2 CuO 4 [16,17]. Note, however, that the theory presented here unambiguously predicts that the in-plane and out-of-plane spin-wave gaps should be equal, while experimentally these gaps have different values.…”
Section: )mentioning
confidence: 50%
“…In particular: (i) Thio et al and Cheong al. [5] observed a first order spin-flop transition as a function of applied magnetic field perpendicular to the Cu-O planes -this was interpreted as being due to the existence of weak ferromagnetic moments in each layer; and (ii) both neutron scattering [16] and AFM resonance measurements [17] have shown that the zonecenter spin-waves in La 2 CuO 4 are gapped with an in-plane gap of ∼ 1.0 meV and an out-ofplane gap of ∼ 2.5 meV. It was immediately realized by the groups which performed these measurements that these effects were manifestations of DM interactions.…”
Section: Relevant Experimental Factsmentioning
confidence: 99%
“…Such couplings are allowed by symmetry on all lattices as well as in amorphous solids. For example, the parent material La 2 CuO 4 of one prominent high T c superconducting cuprate which has a Heisenberg exchange scale of about 100 meV [42] while any magnetic anisotropies, for example inferred from the small spin wave gap, are at most a hundredth of this scale [46].…”
Section: A Spin-space Groups and Magnetic Couplingsmentioning
confidence: 99%