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arXiv 0810.0292cond-mat.supr-concond-mat.str-el
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铜酸盐赝隙相中预形成库珀对的光谱证据

Spectroscopic evidence for preformed Cooper pairs in the pseudogap phase of cuprates

M. Shi, A. Bendounan, E. Razzoli, S. Rosenkranz, M. R. Norman, J. C. Campuzano, J. Chang, M. Mansson, Y. Sassa, T. Claesson, O. Tjernberg, L. Patthey, N. Momono… 展开作者

M. Shi, A. Bendounan, E. Razzoli, S. Rosenkranz, M. R. Norman, J. C. Campuzano, J. Chang, M. Mansson, Y. Sassa, T. Claesson, O. Tjernberg, L. Patthey, N. Momono, M. Oda, M. Ido, S. Guerrero, C. Mudry, J. Mesot

摘要:

对欠掺杂La $_{1.895}$ Sr $_{0.105}$ CuO $_4$的角分辨光电子能谱研究表明,在赝能隙相中,色散有两个分支,分别位于费米能级的上下,费米动量处有一个最小值.这是超导状态下Bogoliubov色散的特征。我们还观察到,超导和赝能隙具有相同的d波形式和相同的振幅。我们的观察提供了直接的证据,预先形成的库珀对,这意味着赝间隙相是超导的前兆。

英文摘要:

Angle-resolved photoemission on underdoped La$_{1.895}$Sr$_{0.105}$CuO$_4$ reveals that in the pseudogap phase, the dispersion has two branches located above and below the Fermi level with a minimum at the Fermi momentum. This is characteristic of the Bogoliubov dispersion in the superconducting state. We also observe that the superconducting and pseudogaps have the same d-wave form with the same amplitude. Our observations provide direct evidence for preformed Cooper pairs, implying that the pseudogap phase is a precursor to superconductivity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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