Extending Universal Nodal Excitations Optimizes Superconductivity in Bi2Sr2CaCu2O8+d

Abstract

Understanding the mechanism by which d-wave superconductivity in the cuprates emerges and is optimized by doping the Mott insulator is one of the major outstanding problems in condensed matter physics. Our high-resolution scanning tunneling microscopy measurements of the high transition temperature (Tc) superconductor Bi2Sr2CaCu2O8+d show that samples with different Tcs in the low doping regime follow a remarkably universal d-wave low energy excitation spectrum, indicating a doping independent nodal gap. We demonstrate that Tc instead correlates with the fraction of the Fermi surface over which the samples exhibit the universal spectrum. Optimal Tc is achieved when all parts of the Fermi surface follow this universal behavior. Increasing temperature above Tc turns the universal spectrum into an arc of gapless excitations, while overdoping breaks down the universal nodal behavior.

To appear in Science express on June 04, 2009. http://www.sciencemag.org/cgi/content/abstract/1174338

References in corpus (20)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• The pseudogap in high-temperature superconductors: an experimental survey
• The doping dependence of T* - what is the real high-Tc phase diagram?
• The pseudogap: friend or foe of high Tc?
• Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• From Fermi Arcs to the Nodal Metal: Scaling of the Pseudogap with Doping and Temperature
• Stripe phases in high-temperature superconductors
• Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
• How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+d
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates
• Direct evidence for a competition between the pseudogap and high temperature superconductivity in the cuprates
• Inherent Inhomogeneities in Tunneling Spectra of BSCCO Crystals in the Superconducting State
• Field-enhanced diamagnetism in intense magnetic field in the pseudogap state of the cuprate $\rm Bi_2Sr_2CaCu_2O_{8+δ}
• Thermal Conductivity across the Phase Diagram of Cuprates: Low-Energy Quasiparticles and Doping Dependence of the Superconducting Gap
• Imaging the Two Gaps of the High-TC Superconductor Pb-Bi2Sr2CuO6+x
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• Protected nodes and the collapse of the Fermi arcs in high Tc cuprates
• Modeling the Fermi arc in underdoped cuprates
• Energy gaps in the failed high-Tc superconductor La1.875Ba0.125CuO4

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