TY - JOUR
T1 - Linking dynamic and thermodynamic properties of cuprates
T2 - An angle-resolved photoemission study of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3 Oy (x=0.1 and 0.4)
AU - Drachuck, Gil
AU - Razzoli, Elia
AU - Ofer, Rinat
AU - Bazalitsky, Galina
AU - Dhaka, R. S.
AU - Kanigel, Amit
AU - Shi, Ming
AU - Keren, Amit
PY - 2014/3/31
Y1 - 2014/3/31
N2 - We report angle-resolved photoemission spectroscopy on two families of high-temperature superconductors (CaxLa1-x)(Ba1.75-x La 0.25+x)Cu3Oy with x=0.1 (Tcmax=56 K) and x=0.4 (Tcmax=82 K). The Fermi surface (FS) is found to be independent of x or y, and its size indicates extreme sample-surface overdoping. This universal FS allows the comparison of dynamical properties between superconductors of similar structure and identical doping, but different Tcmax. We find that the high-energy (|E|>50 meV) nodal velocity in the x=0.4 family is higher than in the x=0.1 family. The implied correlation between Tcmax and the hopping rate t supports the notion of kinetic energy driven superconductivity in the cuprates. We also find that the antinodal gap is higher for the x=0.4 family.
AB - We report angle-resolved photoemission spectroscopy on two families of high-temperature superconductors (CaxLa1-x)(Ba1.75-x La 0.25+x)Cu3Oy with x=0.1 (Tcmax=56 K) and x=0.4 (Tcmax=82 K). The Fermi surface (FS) is found to be independent of x or y, and its size indicates extreme sample-surface overdoping. This universal FS allows the comparison of dynamical properties between superconductors of similar structure and identical doping, but different Tcmax. We find that the high-energy (|E|>50 meV) nodal velocity in the x=0.4 family is higher than in the x=0.1 family. The implied correlation between Tcmax and the hopping rate t supports the notion of kinetic energy driven superconductivity in the cuprates. We also find that the antinodal gap is higher for the x=0.4 family.
UR - http://www.scopus.com/inward/record.url?scp=84898745037&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevB.89.121119
DO - https://doi.org/10.1103/PhysRevB.89.121119
M3 - مقالة
SN - 1098-0121
VL - 89
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 12
M1 - 121119
ER -