Valence band photoemission behavior of Pr_1−xSr_xMnO₃

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• 作者：Kurash ; Ibrahim ; Fengqin ; Liu ; Haijie ; Qian ; Lin ; Guo ; Dingchang ; Xian ; Guangcheng ; Xiong ; Sicheng ; Wu
• 关键词：Valence band ; Photoemission ; Fermi level
• 刊名：Materials Science and Engineering: B
• 出版年：2000
• 出版时间：June 15, 2000
• 年：2000
• 卷：76
• 期：1
• 页码：14-17
• 全文大小：107 K

文摘

Valence band photoemission experiments on Pr_1−xSr_xMnO₃ polycrystalline system with x ranging from 0.0 to 0.4 show that the density of states of the bands appearing in the ranges between Fermi level and 12 eV below Fermi level have a substantial change with the doping level x. These features are discussed in terms of charge transfer in the ground states of Pr_1−xSr_xMnO₃ system. A nonlinear charge transfer with the doping amount x is evidenced and a possible second order phase transition mediated by the charge transfer is proposed.