Using a laser-excited angle-resolved photoemission spectroscopy capable of bulk sensitive and high-energy resolution measurements, we reveal a new phenomenon of superconductors in the optimally doped trilayer ${\mathrm{Bi}}_2{\mathrm{Sr}}_2{\mathrm{Ca}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{10+\delta }$. We observe a hybridization of the Bogoliubov bands derived from the inner and outer ${\mathrm{CuO}}_2$ planes with different magnitudes of energy gaps. Our data clearly exhibit the splitting of coherent peaks and the consequent enhancement of spectral gaps. These features are reproduced by model calculations, which indicate that the gap enhancement extends over a wide range of Fermi surface up to the antinode. The significant modulation of electron pairing uncovered here might be a crucial factor to achieve the highest critical temperature in the trilayer cuprates.

中文翻译：

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最佳掺杂三层Bi2Sr2Ca2Cu3O10 +δ中Bogoliubov带杂交的观察

使用能够进行体积敏感和高能分辨率测量的激光激发角分辨光发射光谱，我们揭示了在最佳掺杂三层中出现超导体的新现象。 ${双}_{\mathrm{2个}}{r}_{\mathrm{2个}}{钙}_{\mathrm{2个}}{铜}_3{\mathrm{Ø}}_{10+\delta }$。我们观察到了来自内部和外部的Bogoliubov带的杂交${\mathrm{氧化铜}}_{\mathrm{2个}}$具有不同能隙大小的平面。我们的数据清楚地显示了相干峰的分裂以及谱隙的增强。这些特征通过模型计算得以重现，表明间隙增强在费米表面的宽范围内延伸至波腹。此处发现的电子对的显着调节可能是在三层铜酸盐中达到最高临界温度的关键因素。