Constancy of the bilayer splitting as a function of doping in Bi₂Sr₂CaCu₂O₈₊δ
Chuang, Y. -D. · Gromko, A. D. · Fedorov, A. V. · Aiura, Y. · Oka, K. · Ando, Yoichi · Dessau, D. S.
Original · EN
Using high energy resolution angle resolved photoemission spectroscopy, we have resolved the bilayer splitting effect in a wide range of dopings of the bilayer cuprate Bi₂Sr₂CaCu₂O₈₊δ. This bilayer splitting is due to a nonvanishing intracell coupling t⊥, and contrary to expectations, it is not reduced in the underdoped materials. This has implications for understanding the increased c-axis confinement in underdoped materials.
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