The nodal gap component as a good candidate for the superconducting order parameter in cuprates

Abstract

Although more than twenty years have passed since the discovery of high temperature cuprate superconductivity, the identification of the superconducting order parameter is still under debate. Here, we show that the nodal gap component is the best candidate for the superconducting order parameter. It scales with the critical temperature $T_c$ over a wide doping range and displays a significant temperature dependence below $T_c$ in both the underdoped and the overdoped regimes of the phase diagram. In contrast, the antinodal gap component does not scale with $T_c$ in the underdoped side and appears to be controlled by the pseudogap amplitude. Our experiments establish the existence of two distinct gaps in the underdoped cuprates.

References in corpus (8)

• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• Two Gaps Make a High Temperature Superconductor?
• Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
• The Ground State of the Pseudogap in Cuprate Superconductors
• Protected nodes and the collapse of the Fermi arcs in high Tc cuprates
• Distinct doping dependences of the pseudogap and superconducting gap La${}_{2-x}$Sr${}_x$CuO${}_4$ cuprate superconductors
• Evolution of the gaps through the cuprate phase-diagram
• Doping Dependence of Two Energy Scales in the Tunneling Spectra of Superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$

Cited by in corpus (3)

• The doping-driven evolution of the superconducting state of a doped Mott insulator: a key for the high temperature superconductivity
• Spin Dynamics in Cuprates: Optical Conductivity of HgBa2CuO4
• Evolution of the dynamical pairing across the phase diagram of a strongly correlated high-temperature superconductor