First time determination of the microscopic structure of a stripe phase: Low temperature NMR in La2NiO4.17

Details First time determination of the microscopic structure of a stripe phase: Low temperature NMR in La2NiO4.17 First time determination of the microscopic structure of a stripe phase: Low temperature NMR in La2NiO4.17

2001-12-04

arxiv.org/abs/cond-mat/0112054v1

Phys. Rev. Lett. 87, 237201 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages including 4 figures

Scientific paper

10.1103/PhysRevLett.87.237201

The experimental observations of stripes in superconducting cuprates and insulating nickelates clearly show the modulation in charge and spin density. However, these have proven to be rather insensitive to the harmonic structure and (site or bond) ordering. Using 139La NMR in La2NiO4.17, we show that in the 1/3 hole doped nickelate below the freezing temperature the stripes are strongly solitonic and site ordered with Ni3+ ions carrying S=1/2 in the domain walls and Ni2+ ions with S=1 in the domains.

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