BCS-like Bogoliubov quasiparticles in high-Tc superconductors observed by angle-resolved photoemission spectroscopy -: art. no. 217002
BCS-like Bogoliubov quasiparticles in high-Tc superconductors observed by angle-resolved photoemission spectroscopy -: art. no. 217002
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DOI：
10.1103/physrevlett.90.217002
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发表时间：
2003-05-30
影响因子：
8.6
通讯作者：
Matsuda, A
中科院分区：
文献类型：
--
作者：
Matsui, H;Sato, T;Matsuda, A
我们对三层高 T-c 铜酸盐 Bi2Sr2Ca2Cu3O10+delta 进行了高分辨率角分辨光电子能谱。我们观察了 Bogoliubov 准粒子的全能量色散（电子和空穴分支），并根据光谱强度以及基于 BCS 理论的能量色散确定了 E-F 之上和之下的相干因子作为动量的函数。实验与理论预测之间良好的定量一致性表明 BCS 形式在描述铜酸盐超导状态方面的基本有效性。
We performed high-resolution angle-resolved photoemission spectroscopy on triple-layered high-T-c cuprate Bi2Sr2Ca2Cu3O10+delta. We have observed the full energy dispersion (electron and hole branches) of Bogoliubov quasiparticles and determined the coherence factors above and below E-F as a function of momentum from the spectral intensity as well as from the energy dispersion based on BCS theory. The good quantitative agreement between the experiment and the theoretical prediction suggests the basic validity of BCS formalism in describing the superconducting state of cuprates.