Monotonic d-wave superconducting gap of the optimally doped Bi2Sr1.6La0.4CuO6 superconductor by laser-based angle-resolved photoemission spectroscopy

@inproceedings{Meng2009MonotonicDS,
  title={Monotonic d-wave superconducting gap of the optimally doped Bi2Sr1.6La0.4CuO6 superconductor by laser-based angle-resolved photoemission spectroscopy},
  author={Jianqiao Meng and Wentao Zhang and Guodong Liu and Lin Zhao and Haiyun Liu and Xiaowen Jia and Wei Lu and Xiaoli Dong and Guiling Wang and Hongbo Zhang and Yong Zhou and Yong Zhu and Xiaoyang Wang and Zhongxian Zhao and Zuyan Xu and Chuangtian Chen and X. J. Zhou},
  year={2009}
}
  • Jianqiao Meng, Wentao Zhang, +14 authors X. J. Zhou
  • Published 2009
  • Physics
  • We propose that the upper Hubbard band (electronlike) and the Zhang-Rice singlet band (holelike) are two essential components in describing low-energy excitations of electron-doped cuprate superconductors. We find that the gap between these two bands is significantly smaller than the charge-transfer gap measured by optics and is further reduced upon doping. This indicates that the charge fluctuation is strong and the system is in the intermediate correlation regime. A two-band model is derived… CONTINUE READING

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