Superconducting coherence peak in the electronic excitations of a single-layer Bi2Sr1.6La0.4CuO6+delta cuprate superconductor.
Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high-Tc superconductor. In the antinodal region with a maximal d-wave gap, the symbolic superconducting coherence peak, which has been widely observed in multi-CuO2-layer cuprate superconductors, is unambiguously observed in a single-layer system. The associated peak-dip separation is just about 19 meV, which is much smaller than its counterparts in multilayered compounds, but correlates with the energy scales of spin excitations in single-layer cuprates.
Wei
J
J
Department of Physics, Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai 200433, People's Republic of China.
Zhang
Y
Y
Ou
H W
HW
Xie
B P
BP
Shen
D W
DW
Zhao
J F
JF
Yang
L X
LX
Arita
M
M
Shimada
K
K
Namatame
H
H
Taniguchi
M
M
Yoshida
Y
Y
Eisaki
H
H
Feng
D L
DL