High energy dispersion relations for the high temperature Bi2Sr2CaCu2O8 superconductor from laser-based angle-resolved photoemission spectroscopy.
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.
Zhang
Wentao
W
National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Liu
Guodong
G
Meng
Jianqiao
J
Zhao
Lin
L
Liu
Haiyun
H
Dong
Xiaoli
X
Lu
Wei
W
Wen
J S
JS
Xu
Z J
ZJ
Gu
G D
GD
Sasagawa
T
T
Wang
Guiling
G
Zhu
Yong
Y
Zhang
Hongbo
H
Zhou
Yong
Y
Wang
Xiaoyang
X
Zhao
Zhongxian
Z
Chen
Chuangtian
C
Xu
Zuyan
Z
Zhou
X J
XJ