Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-05-19
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages (RevTex), 4 figures (PS)
Scientific paper
10.1103/PhysRevLett.81.5410
New neutron diffraction and inelastic neutron scattering experiments on Ba2CuGe2O7 suggest that the previously suggested model for the magnetism of this material (an ideal sinusoidal spin spiral, stabilized by isotropic exchange and Dzyaloshinskii-Moriya interactions) needs to be refined. Both new and previously published experimental results can be quantitatively explained by taking into account the Shekhtman-Entin-Wohlman-Aharony (SEA) term, a special anisotropy term that was predicted to always accompany Dzyaloshinskii-Moriya interactions in insulators. Our experimental results present the first clear evidence to that SEA interactions can lead to substantial observable effects in a real magnetic system.
Erwin R.
Maslov Sergei
Masuda Toshihiko
Regnault Louis-Pierre
Shirane Gen
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