Band-Resolved Double Photoemission Spectroscopy on Correlated Valence Electron Pairs in Metals

被引：21
|
作者：
Truetzschler, Andreas [1 ,2 ]
Huth, Michael [1 ]
Chiang, Cheng-Tien [1 ,2 ]
Kamrla, Robin [1 ,2 ]
Schumann, Frank O. [1 ]
Kirschner, Juergen [1 ,2 ]
Widdra, Wolf [1 ,2 ]
机构：
[1] Max Planck Inst Mikrostrukturphys, Weinberg 2, D-06120 Halle, Germany
[2] Martin Luther Univ Halle Wittenberg, Inst Phys, Von Danckelmann Pl 3, D-06120 Halle, Germany
来源：
PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 13期
关键词：
OFF-SITE INTERACTIONS; AUGER-SPECTRA; TRANSITION; RESONANCES; SOLIDS; COPPER; STATE; CU;
D O I：
10.1103/PhysRevLett.118.136401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Correlated valence electrons in Ag and Cu are investigated using double photoemission spectroscopy driven by a high-order harmonic light source. Electron pairs consisting of two d electrons as well as pairs with one sp and one d electron are resolved in the two-dimensional energy spectrum. Surprisingly, the intensity ratio of sp-d to d-d pairs from Ag is 3 times higher than in the self-convoluted density of states. Our results directly show the band-resolved configurations of electron pairs in solids and emphasize a band-dependent picture for electron correlation even in these paradigmatic metals.
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页数：5
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