Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3

Details Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3 Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3

2006-03-20

arxiv.org/abs/cond-mat/0603496v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures, Physical Review B rapid communication, to be published

Scientific paper

10.1103/PhysRevB.73.100409

Soft x-ray resonant scattering at the Ni L2,3 edges is used to test models of magnetic and orbital-ordering below the metal-insulator transition in NdNiO3. The large branching ratio of the L3 to L2 intensities of the (1/2,0,1/2) reflection and the observed azimuthal angle and polarization dependence originates from a non collinear magnetic structure. The absence of an orbital signal and the non collinear magnetic structure show that the nickelates are materials for which orbital ordering is absent at the metal-insulator transition.

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