Linking Dynamic and Thermodynamic Properties of Cuprates; an ARPES study of (CaLa)(BaLa)${}_2$Cu${}_3$O${}_y$

Abstract

We report angle-resolved photoemission spectroscopy (ARPES) on two families of high temperature superconductors (Ca${}_x$La${}_{1-x}$)(Ba${}_{1.75-x}$ La )Cu${}_3$O${}_y$ with $x=0.1$ ($T_c^{max}=56$ K) and $x=0.4$ ( 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 allowes the comparison of dynamical properties between superconductors of similar structure and identical doping, but different . We find that the high-energy ($\left|E\right|>50$% meV) nodal velocity in the $x=0.4$ family is higher than in the $x=0.1$ family. The implied correlation between $T_c^{max}$ and the hopping rate 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.

References in corpus (3)

• Electronic phase diagram of high temperature copper oxide superconductors
• A magnetic analog of the isotope effect in cuprates
• Universal doping dependence of the ground state staggered magnetization in cuprates

Cited by in corpus (6)

• Kinetic-energy driven superconductivity in cuprate superconductors
• Universal properties of high-temperature superconductors from real-space pairing III: The role of correlated hopping and intersite Coulomb interaction within the t-J-U model
• 17O-NMR Knight shift study of the interplay between superconductivity and pseudogap in (Ca_xLa_{1-x})(Ba_{1.75 - x}La_{0.25 + x})Cu_3O_y
• Relation between cuprate superconductivity and magnetism: A Raman study of (CaLa)(BaLa)${}_2$Cu${}_3$O${}_y$
• Relevance of magnetism to cuprate superconductivity: Lanthanides versus charge-compensated cuprates
• Systematic Raman study of optical phonons in $R$Ba${}_2$Cu${}_3$O${}_{6+\delta }$ ($R$ = Y, Dy, Gd, Sm, Nd): Antiferromagnetic coupling strength versus lattice parameters