Artigo Acesso aberto

Electronic excitations near the Brillouin zone boundary of Bi 2 Sr 2 CaCu </mml:mrow…

2002; American Physical Society; Volume: 65; Issue: 22 Linguagem: Inglês

10.1103/physrevb.65.220501

ISSN

1095-3795

Autores

D. L. Feng, C. Kim, Hiroshi Eisaki, Dong-Hui Lu, A. Damascelli, Kyle Shen, F. Ronning, N. P. Armitage, Nobu‐Hisa Kaneko, M. Greven, J. Shimoyama, K. Kishio, Ryozo Yoshizaki, Genda Gu, Zhi‐Xun Shen,

Tópico(s)

High-pressure geophysics and materials

Resumo

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 $(\ensuremath{\pi},0)$ region of optimal doped and underdoped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ has significant contributions from the bilayer band splitting, and that the scattering rate in this region is considerably smaller than previously estimated. This picture of the electronic excitation near $(\ensuremath{\pi},0)$ puts additional experimental constraints on various microscopic theories and data analyses.

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