Role of strong correlation in the recent ARPES experiments for cuprate superconductors

Abstract

Motivated by recent photoemission experiments on cuprates, the low-lying excitations of a strongly correlated superconducting state are studied numerically. It is observed that along the nodal direction these low-lying one-particle excitations show a linear momentum dependence for a wide range of excitation energies and, thus, they do not present a kink-like structure. The nodal Fermi velocity $v_{\mathrm{F}}$, as well as other observables, are systematically evaluated directly from the calculated dispersions, and they are found to compare well with experiments. It is argued that the parameter dependence of $v_{\mathrm{F}}$ is quantitatively explained by a simple picture of a renormalized Fermi velocity.

5 pages, 4 figures, to be published in Phys. Rev. Lett

References in corpus (1)

• An unusual isotope effect in a high-transition-temperature superconductor

Cited by in corpus (22)

• Universal quantum criticality in the metal-insulator transition of two-dimensional interacting Dirac electrons
• Competition between d-wave superconductivity and antiferromagnetism in the 2D Hubbard model
• High-temperature superconductivity in the Hubbard model: Gutzwiller wave-function solution
• High temperature superconductivity in the two-dimensional $t$-$J$ model: Gutzwiller wave function solution
• Electronic structure of strongly correlated d-wave superconductors
• Classification of spin liquids on the square lattice with strong spin-orbit coupling
• A Variational Monte Carlo Study of the Current Carried by a Quasiparticle
• Two-mode variational Monte Carlo study of Quasiparticle excitations in cuprates
• Coherent Inverse Photoemission Spectrum for Gutzwiller Projected Superconductors
• One-electron self energies and spectral functions for the t-J model in the large-N limit
• Quasiparticle spectral weights of Gutzwiller-projected high T_c superconductors
• One-Particle Anomalous Excitations of Gutzwiller Projected BCS Superconductors and Bogoliubov Quasi-Particle Characteristics
• On the Origin of the Tunneling Asymmetry in the Cuprate Superconductors: a variational perspective
• Theory of the quasiparticle excitation in high T${}_c$ cuprates: quasiparticle charge and nodal-antinodal dichotomy
• Topological Order in Gutzwiller Projected Wave Functions for Quantum Antiferromagnets
• Quenching the Superconducting State of Cuprate Compounds with Electric Currents: A Variational Study
• Grand-canonical variational approach for the t-J model
• SU(2) approach to the pseudogap phase of high-temperature superconductors: electronic spectral functions
• Exact Jastrow-Slater wave function for the one-dimensional Luttinger model
• Electron-phonon coupling in a two-dimensional inhomogeneous electron gas: consequences for surface spectral properties
• Low-lying quasiparticle excitations in strongly-correlated superconductors: An ansatz from BCS quasiparticle excitations?
• Absence of the $T^{2/3}$ specific heat anomaly in a $U(1)$ spin liquid with a large spinon Fermi surface: confinement of slave particles and non-locality of spinons