期刊
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
卷 208, 期 -, 页码 56-62出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elspec.2015.07.006
关键词
Complex oxides; X-ray absorption spectroscopy; Nickelates; Metal to insulation transition
类别
资金
- U.S. Department of Energy, Office of Science [DEAC02-06CH11357]
- U. S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-03ER46097]
- NIU's Institute for Nanoscience, Engineering, and Technology
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4534]
- DOD-ARO [0402-17291]
The perovksite rare-earth nickelates, RNiO3 (R = La center dot center dot center dot Lu), are a class of materials displaying a rich phase diagram of metallic and insulating phases associated with charge and magnetic order. Being in the charge transfer regime, Ni3+ in octahedral coordination displays a strong hybridization with oxygen to form 3d-2p mixed states, which results in a strong admixture of 3d(8)(L) under bar into 3d(7), where (L) under bar denotes a hole on the oxygen. To understand the nature of this strongly hybridized ground state, we present a detailed study of the Ni and O electronic structure using-high-resolution soft X-ray absorption spectroscopy (XAS). Through a comparison of the evolution of the XAS line-shape at Ni L- and O K-edges across the phase diagram, we explore the changes in the electronic signatures in connection with the insulating and metallic phases that support the idea of hybridization playing a fundamental role. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据