Incommensurability of stripes in La2-xSrxNiO4+y
Abstract
An analytic expression for the incommensurability of static stripes in La2-xSrxNiO4+y is given, depending on the hole density nh = x + 2y. Apart from geometry factors the formula is the same as for stripes in the related cuprates La2-xAexCuO4 (Ae = Sr, Ba). Agreement with experimental data from neutron and X-ray diffraction is good. The stability of stripes is interpreted in terms of the separation of hole charges residing at every nuth node of the associated magnetization waves.
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