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Nature of the Electronic Excitations near the Brillouin Zone Boundary of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$

D. L. Feng·C. Kim·H. Eisaki·D. H. Lu·K. M. Shen·F. Ronning·N. P. Armitage·A. Damascelli·N. Kaneko·M. Greven·J. -i. Shimoyama·K. Kishio·R. Yoshizaki·G. D. Gu·Z. -X. Shen
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Abstract

Based on angle resolved photoemission spectra measured on different systems at different dopings, momenta and photon energies, we show that the anomalously large spectral linewidth in the $(π,0)$ region of optimal doped and underdoped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ has significant contributions from the bilayer splitting, and that the scattering rate in this region is considerably smaller than previously estimated. This new picture of the electronic excitation near $(π,0)$ puts additional experimental constraints on various microscopic theories and data analysis.

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D. L. Feng, C. Kim, H. Eisaki, D. H. Lu, K. M. Shen, F. Ronning, N. P. Armitage, A. Damascelli, N. Kaneko, M. Greven, J. -i. Shimoyama, K. Kishio, R. Yoshizaki, G. D. Gu, Z. -X. Shen. 2001-07-04. Nature of the Electronic Excitations near the Brillouin Zone Boundary of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$. https://doi.org/10.1103/physrevb.65.220501

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