High Energy Dispersion Relations for the High Temperature Bi2Sr2CaCu2O8 Superconductor from Laser-Based Angle-Resolved Photoemission Spectroscopy

Wentao Zhang, Guodong Liu, Jianqiao Meng, Lin Zhao, Haiyun Liu, Xiaoli Dong, Wei Lu, J. S. Wen, Z. J. Xu, G. D. Gu, T. Sasagawa, Guiling Wang, Yong Zhu, Hongbo Zhang, Yong Zhou, Xiaoyang Wang, Zhongxian Zhao, Chuangtian Chen, Zuyan Xu, and X. J. Zhou
Phys. Rev. Lett. 101, 017002 – Published 2 July 2008

Abstract

Laser-based angle-resolved photoemission spectroscopy measurements have been carried out on the high energy electron dynamics in Bi2Sr2CaCu2O8 high temperature superconductor. Our superhigh resolution data, momentum-dependent measurements, and complete analysis provide important information to judge the nature of the high energy dispersion and kink. Our results rule out the possibility that the high energy dispersion from the momentum distribution curve (MDC) may represent the true bare band as believed in previous studies. We also rule out the possibility that the high energy kink represents electron coupling with some high energy modes as proposed before. Through detailed MDC and energy distribution curve analyses, we propose that the high energy MDC dispersion may not represent intrinsic band structure.

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  • Received 17 January 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.017002

©2008 American Physical Society

Authors & Affiliations

Wentao Zhang1, Guodong Liu1, Jianqiao Meng1, Lin Zhao1, Haiyun Liu1, Xiaoli Dong1, Wei Lu1, J. S. Wen2, Z. J. Xu2, G. D. Gu2, T. Sasagawa3, Guiling Wang4, Yong Zhu5, Hongbo Zhang4, Yong Zhou4, Xiaoyang Wang5, Zhongxian Zhao1, Chuangtian Chen5, Zuyan Xu4, and X. J. Zhou1,*

  • 1National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 3Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama Kanagawa, Japan
  • 4Laboratory for Optics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 5Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

  • *Corresponding author. XJZhou@aphy.iphy.ac.cn

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Vol. 101, Iss. 1 — 4 July 2008

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