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对于YBa_2Cu_3O_(～7)超导体的Ba 3d X光电子能谱(XPS)存在分裂(出现肩峰)的现象有很多不同的解释.Kohiki等认为主峰和肩峰分别代表晶格Ba~(2+)离子和金属Ba;Han等则认为它们分别代表Ba~(2+)离子和更高价态的Ba离子;Ji等提出超导体中存在Ba~(2+)和Ba~((2-δ)+)两种离子;唐有祺等报道超导体存在体相钡、表面BaCO_3的钡和绝缘相中的钡,它们的Ba 3d_(5/2)结合能分别为777.8,779。7和781.5eV;Fjellvag等也观察到Ba3d谱中出
There are many different explanations for the phenomenon that Ba 3d X-ray photoelectron spectroscopy (XPS) of YBa_2Cu_3O_ (~ 7) superconductors has splitting (shoulder acromion) .Kohiki et al. Think that the main peak and the acromion represent the lattice Ba ~ (2+) And Ba; Han et al. Consider them to represent Ba 2+ ions and Ba ions with higher valence states, respectively. Ji et al. Proposed the existence of Ba 2+ and Ba 2+ in the superconductor. Species of ions; Tang Youqi et al reported superconductors barium, barium BaCO3 surface and barium in the insulating phase, their Ba 3d_ (5/2) binding energy were 777.8,779.7 and 781.5eV; Fjellvag also observed Ba3d spectrum out