Core-hole screening response in two-dimensional cuprates: A high-resolution x-ray photoemission study
作者： A. Koitzsch , J. Fink , M. S. Golden , K. Karlsson , O. Jepsen
DOI: 10.1103/PHYSREVB.66.024519
关键词: Materials science 、 Core (optical fiber) 、 Line (formation) 、 Spectral line 、 X ray photoemission 、 Anderson impurity model 、 Condensed matter physics 、 Resolution (electron density) 、 Core level 、 Cuprate
摘要: We have studied the core level photoemission spectra of two-dimensional cuprates Sr 2 CuO Cl , Br . Ca Bi CaCu O 8 + Φ and Nd 4 with particular focus on screening response to core-hole creation in Cu-2p 3 / level. The influence apex positions shape so-called main line is investigated, found be weak. Additionally, an Anderson impurity model was used fit lines, obtaining good agreement data from For other compounds, while energy spread two channels (local nonlocal) well reproduced, theory underestimates width nonlocally screened feature. shapes lines are discussed detail.
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