Constancy of the bilayer splitting as a function of doping in Bi₂Sr₂CaCu₂O_8+δ

2001/06/29 by Y. -D. Chuang, Chuang, Y. -D., A. D. Gromko +11
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0107002

arxiv created 2001/07/06 · arxiv updated 2009/11/30

Abstract

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 Bi₂Sr₂CaCu₂O_8+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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