Lattice fluctuations and inhomogeneous charge states of high-T-c superconductors
文献类型：期刊论文
| 作者 | Saini, NL; Oyanagi, H; Wu ZY(吴自玉) ; Wu, ZY; Bianconi, A
|
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2002 |
| 卷号 | 15期号:3页码:439-445 |
| 通讯作者 | Univ Roma La Sapienza, Unita INFM, I-00185 Rome, Italy ; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy ; AIST, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 305, Japan ; Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China |
| 英文摘要 | We have used x-ray absorption spectroscopy as a tool to study instantaneous local lattice distortions of the CuO2 plane in high-T-c superconductors and we have investigated the inhomogeneous charge states of these materials. The temperature-dependent Cu K-edge extended x-ray absorption fine structure (EXAFS) has been used to determine the correlated Debye-Waller factor of the Cu-O bonds, measuring local lattice fluctuations. The Debye-Waller factor of the Cu-O bonds shows an order-parameter-like behaviour across the charge stripe ordering temperature. The EXAFS results are supported by a temperature-dependent Cu K-edge x-ray absorption near edge structure (XANES) revealing a particular change in the local lattice displacements at the charge stripe ordering. The experimental Cu K-edge XANES results are well reproduced by full multiple scattering calculations including different distortions of the CuO2 plane showing particular lattice displacements which are consistent with the EXAFS results. The particular distortion mode as a response function to the charge stripe ordering has been discussed with several examples. The results are consistent with an inhomogeneous charge distribution in the high-T-c cuprates suggesting an intimate relationship between the charge stripe ordering, local lattice fluctuations and high-T-c superconductivity in the cuprates. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Applied ; Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000174698700031 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237491]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Saini, NL,Oyanagi, H,Wu ZY,et al. Lattice fluctuations and inhomogeneous charge states of high-T-c superconductors[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2002,15(3):439-445. |
| APA | Saini, NL,Oyanagi, H,吴自玉,Wu, ZY,&Bianconi, A.(2002).Lattice fluctuations and inhomogeneous charge states of high-T-c superconductors.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,15(3),439-445. |
| MLA | Saini, NL,et al."Lattice fluctuations and inhomogeneous charge states of high-T-c superconductors".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 15.3(2002):439-445. |
入库方式： OAI收割
来源：高能物理研究所
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