Magnetic excitations in pure, lightly doped, and weakly metallic La2CuO4.
作者： B. Keimer , N. Belk , R. J. Birgeneau , A. Cassanho , C. Y. Chen
DOI: 10.1103/PHYSREVB.46.14034
关键词: Metal 、 Physics 、 Magnetic structure 、 Néel temperature 、 Context (language use) 、 Condensed matter physics 、 Magnetization 、 Inorganic compound 、 Doping 、 Magnetism 、 Crystallography
摘要: We report a comprehensive neutron-scattering study of the evolution of the magnetic excitations in La 2− x Sr x CuO 4 for 0≤ x≤ 0.04. We first present accurate measurements of the magnetic correlation length and the sublattice magnetization of a carrier-free La 2 CuO 4 crystal and analyze these in the context of recent theoretical predictions. We then systematically investigate the influence of different dopants on the magnetism: Our measurements indicate that static vacancies in the La 2 Cu 1− y Zn y O 4 system affect the …
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