Stripeless incommensurate magnetism in a doped strongly correlated oxide

Details Stripeless incommensurate magnetism in a doped strongly correlated oxide Stripeless incommensurate magnetism in a doped strongly correlated oxide

2006-08-28

arxiv.org/abs/cond-mat/0608575v3

Phys. Rev. B 75, 184443 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 7 color figures, amended version with significant revisions

Scientific paper

10.1103/PhysRevB.75.184443

We studied the nano-scale structure of the short-range incommensurate magnetic order in La1.5Sr0.5CoO4 by elastic neutron scattering. We find that magnetic diffuse scattering is isotropic in the a-b plane, in contrast with the naive expectation based on the popular stripe model. Indeed, charge segregation into lines favoring certain lattice direction(s) would facilitate linear stacking faults in an otherwise robust antiferromagnetism of un-doped material, leading to anisotropic disorder, with a characteristic symmetry pattern present in the neutron scattering data.

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