Zhang-Rice physics and anomalous copper states in A-site ordered perovskites
文献类型：期刊论文
| 作者 | Meyers, D ; Mukherjee, S ; Cheng, JG ; Middey, S ; Zhou, JS ; Goodenough, JB ; Gray, BA ; Freeland, JW ; Saha-Dasgupta, T ; Chakhalian, J |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2013 |
| 卷号 | 3 |
| ISSN号 | 2045-2322 |
| 通讯作者 | Meyers, D (reprint author), Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA. |
| 中文摘要 | In low dimensional cuprates several interesting phenomena, including high T-c superconductivity, are deeply connected to electron correlations on Cu and the presence of the Zhang-Rice (ZR) singlet state. Here, we report on direct spectroscopic observation of the ZR state responsible for the low-energy physical properties in two isostructural A-site ordered cuprate perovskites, CaCu3Co4O12 and CaCu3Cr4O12 as revealed by resonant soft x-ray absorption spectroscopy on the Cu L-3,L-2- and O K-edges. These measurements reveal the signature of Cu in the high-energy 3+ (3d(8)), the typical 2+ (3d(9)), as well as features of the ZR singlet state (i.e., 3d(9)(L) under bar, (L) under bar denotes an oxygen hole). First principles GGA + U calculations affirm that the B-site cation controls the degree of Cu-O hybridization and, thus, the Cu valency. These findings introduce another avenue for the study and manipulation of cuprates, bypassing the complexities inherent to conventional chemical doping (i.e. disorder) that hinder the relevant physics. |
| 资助信息 | DOD-ARO Grant [0402-17291]; NSF Grant [DMR-1122603]; CSIR, India; DST, India; U.S. Department of Energy, Office of Science [DEAC02-06CH11357]; Japan Society for the Promotion of Science [12F02023]; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57667]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Meyers, D,Mukherjee, S,Cheng, JG,et al. Zhang-Rice physics and anomalous copper states in A-site ordered perovskites[J]. SCIENTIFIC REPORTS,2013,3. |
| APA | Meyers, D.,Mukherjee, S.,Cheng, JG.,Middey, S.,Zhou, JS.,...&Chakhalian, J.(2013).Zhang-Rice physics and anomalous copper states in A-site ordered perovskites.SCIENTIFIC REPORTS,3. |
| MLA | Meyers, D,et al."Zhang-Rice physics and anomalous copper states in A-site ordered perovskites".SCIENTIFIC REPORTS 3(2013). |
入库方式： OAI收割
来源：物理研究所
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