Coherent quasiparticle weight and its connection to high-T(c) superconductivity from angle-resolved photoemission.
We study the doping and temperature dependence of the single-particle coherent weight, z(A), for high- T(c) superconductors Bi(2)Sr(2)CaCu(2)O(8+x) using angle-resolved photoemission. We find that at low temperatures the coherent weight z(A) at (pi,0) is proportional to the carrier concentration x and that the temperature dependence of z(A) is similar to that of the c-axis superfluid density. We show that, for a wide range of carrier concentration, the superconducting transition temperature scales with the product of the low-temperature coherent weight and the maximum superconducting gap.
Ding
H
H
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
Engelbrecht
J R
JR
Wang
Z
Z
Campuzano
J C
JC
Wang
S C
SC
Yang
H B
HB
Rogan
R
R
Takahashi
T
T
Kadowaki
K
K
Hinks
D G
DG