Valla T, Kidd T E, Yin W-G, Gu G D, Johnson P D, Pan Z-H, Fedorov A V
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett. 2007 Apr 20;98(16):167003. doi: 10.1103/PhysRevLett.98.167003. Epub 2007 Apr 18.
Photoemission studies show the presence of a high-energy anomaly in the observed band dispersion for two families of cuprate superconductors, Bi2Sr2CaCu2O8+delta and La 2-x BaxCuO4. 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.
光电子能谱研究表明，对于两类铜酸盐超导体Bi2Sr2CaCu2O8+δ和La2-xBaxCuO4，在观测到的能带色散中存在高能异常。该异常出现在约340毫电子伏特的结合能处，被发现是各向异性的，且相对弱依赖于掺杂。发现来自短程或最近邻自旋激发的散射能够充分描述观测到的现象。
