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NQR Study of Superconducting Mechanism mediated by Valence Fluctuations

NQR Study of Superconducting Mechanism mediated by Valence Fluctuations
价态涨落介导的超导机制的NQR研究
批准号:
21540338
负责人:
FUJIWARA Kenji
金额:
$2.91万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2009
资助国家:
日本
项目状态:
已结题
起止时间:
2009 至 2011

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英文摘要
We study mechanism of exotic superconductivity in strongly correlated electron system under high pressure, and challenge to elucidate novel pairing interactions(valence and/or orbital fluctuations), resulting in strong coulomb interaction between the electrons. NQR frequency(^<63>ν_Q) for^<63> Cu nuclei in CeCu_2Si_2 deviates from the linear pressure dependence. The observed downward deviation of^<63>ν_Q is associated with increase of Ce valence. Above 4. 5 GPa, the linear relation of^<63>ν_Q is observed again, closely related to sharp crossover to high valence state.
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CeCu_2Si_2におけるCu核のNOR周波数の圧力依存性-2
CeCu_2Si_2-2 中铜核 NOR 频率的压力依赖性
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者: [K. Iwano, T. Yokoo, M. Oguro, and S. Ikeda, 岩田真和]
通讯作者: 岩田真和
重い電子系超伝導体CeCu_2Si_2の価数揺らぎ超伝導機構の検証-Cu-NQRからのアプローチ-
验证重电子超导体CeCu_2Si_2价态涨落超导机制 - 来自Cu-NQR的方法 -
DOI: --
发表时间: 2009
期刊: 固体物理
影响因子: --
作者: [藤原賢二, 小林達生]
通讯作者: 小林達生
Cu-NQR of CeCu2Si2 under high pressure
高压下 CeCu2Si2 的 Cu-NQR
DOI: 10.1088/1742-6596/391/1/012012
发表时间: 2012
期刊: Journal of Physics: Conference Series
影响因子: --
作者: [K. Fujiwara, M. Iwata, Y. Okazaki, Y. Ikeda, S. Araki, T. Kobayashi, K. Murata, C. Geibel, F. Steglich]
通讯作者: F. Steglich
DOI: 10.1088/1742-6596/200/1/012043
发表时间: 2010
期刊:
影响因子: --
作者: [K. Fujiwara;K. Morimoto;E. Maeda;S. Nishigori]
通讯作者: K. Fujiwara;K. Morimoto;E. Maeda;S. Nishigori
32
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