High-energy kink observed in the electron dispersion of high-temperature cuprate superconductors

被引：127
|
作者：
Valla, T. [1 ]
Kidd, T. E.
Yin, W.-G.
Gu, G. D.
Johnson, P. D.
Pan, Z.-H.
Fedorov, A. V.
机构：
[1] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA
[2] Univ No Iowa, Dept Phys, Cedar Falls, IA 50614 USA
[3] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.98.167003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Photoemission studies show the presence of a high-energy anomaly in the observed band dispersion for two families of cuprate superconductors, Bi2Sr2CaCu2O8+delta and La2-xBaxCuO4. The anomaly, which occurs at a binding energy of approximately 340 meV, is found to be anisotropic and relatively weakly doping dependent. Scattering from short range or nearest neighbor spin excitations is found to supply an adequate description of the observed phenomena.
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页数：4
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