Is stripe incommensurability in La2-xSrxCoO4 proportional to doping?
Abstract
The longstanding notion of stripe incommensurability being proportional to doping, δ(x) ~ x, in lanthanum transition-metal oxides, La2-xSrxTmO4 (Tm = Cu, Ni, Co), is partly borne out by experiment but also plagued with exceptions. Future neutron-scattering experiments on cobaltates could provide a clear distinction whether a linear or square-root dependence, δ(x) ~ sqrt(x - x0), is valid.
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