Probing the coulomb interaction of the unconventional superconductor PuCoGa5 by phonon spectroscopy
Probing the coulomb interaction of the unconventional superconductor PuCoGa5 by phonon spectroscopy
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DOI：
10.1103/physrevlett.96.237003
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发表时间：
2006-06
影响因子：
8.6
通讯作者：
S. Raymond;P. Piekarz;J. Sanchez;J. Serrano;M. Krisch;B. Janoušová;J. Rebizant;N. Metoki;K. Kaneko;Paweł T. Jochym;A. Oleś;K. Parlinski
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文献类型：
--
作者：
S. Raymond;P. Piekarz;J. Sanchez;J. Serrano;M. Krisch;B. Janoušová;J. Rebizant;N. Metoki;K. Kaneko;Paweł T. Jochym;A. Oleś;K. Parlinski
用非弹性X射线散射研究了超导体PuCoGa（5）的声子色散曲线。实验数据与从头算晶格动力学计算结果吻合得很好。只有当考虑到5f电子之间约等于3eV的局部库仑排斥U时，才能得到声子谱的准确描述。
The phonon dispersion curves of the superconductor PuCoGa(5) were studied by inelastic x-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U approximately equal 3 eV among 5f electrons is taken into account.