Constancy of the bilayer splitting as a function of doping in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$

Y. -D. Chuang; A. D. Gromko; A. V. Fedorov; Y. Aiura; K. Oka; Yoichi Ando; D. S. Dessau

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Constancy of the bilayer splitting as a function of doping in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$

Y. -D. Chuang·A. D. Gromko·A. V. Fedorov·Y. Aiura·K. Oka·Yoichi Ando·D. S. Dessau

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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 $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$. This bilayer splitting is due to a nonvanishing intracell coupling $t_{\perp}$, 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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Y. -D. Chuang, A. D. Gromko, A. V. Fedorov, Y. Aiura, K. Oka, Yoichi Ando, D. S. Dessau. 2001-07-06. Constancy of the bilayer splitting as a function of doping in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$. https://arxiv.org/abs/cond-mat/0107002

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