Electron-Spin Excitation Coupling in an Electron Doped Copper Oxide Superconductor

Abstract

High-temperature (high-Tc) superconductivity in the copper oxides arises from electron or hole doping of their antiferromagnetic (AF) insulating parent compounds. The evolution of the AF phase with doping and its spatial coexistence with superconductivity are governed by the nature of charge and spin correlations and provide clues to the mechanism of high-Tc superconductivity. Here we use a combined neutron scattering and scanning tunneling spectroscopy (STS) to study the Tc evolution of electron-doped superconducting Pr0.88LaCe0.12CuO4-delta obtained through the oxygen annealing process. We find that spin excitations detected by neutron scattering have two distinct modes that evolve with Tc in a remarkably similar fashion to the electron tunneling modes in STS. These results demonstrate that antiferromagnetism and superconductivity compete locally and coexist spatially on nanometer length scales, and the dominant electron-boson coupling at low energies originates from the electron-spin excitations.

30 pages, 12 figures, supplementary information included

References in corpus (16)

• Giant Phonon-induced Conductance in Scanning Tunneling Spectroscopy of Gate-tunable Graphene
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Spin correlations in the electron-doped high-transition-temperature superconductor Nd{2-x}Ce{x}CuO{4+/-delta}
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• Evolution of the electronic excitation spectrum with strongly diminishing hole-density in superconducting Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}
• Resonance in the electron-doped high-Tc superconductor Pr0.88LaCe0.12CuO(4-delta)
• Competition between d-wave superconductivity and antiferromagnetism in the 2D Hubbard model
• Microscopic annealing process and its impact on superconductivity in T'-structure electron-doped copper oxides
• A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
• High Energy Spin Excitations in Electron-Doped Superconducting Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$ with $T_c=21$ K
• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d
• The resonance peak in the electron-doped cuprate superconductors
• Magnetic-field-induced spin excitations and renormalized spin gap of the underdoped superconductor La${}_{1.895}$Sr${}_{0.105}$CuO${}_4$
• Quantum Spin Excitations through the metal-to-insulator crossover in $YB{a}_{2}C{u}_3{O}_{6+y}$
• Magnetic fluctuations in n-type high-$T_c$ superconductors reveal breakdown of fermiology
• Destruction of Neel order and appearance of superconductivity in electron-doped cuprates by oxygen annealing process

Cited by in corpus (12)

• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• Evidence of a spin resonance mode in the iron-based superconductor Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ from scanning tunneling spectroscopy
• Electron doping evolution of the anisotropic spin excitations in BaFe2-xNixAs2
• Observation of superconducting collective modes from competing pairing instabilities in single-layer NbSe${}_2$
• Spin-Orbit Excitons in CoO
• Magnetic anisotropy in hole-doped superconducting Ba 0.67K 0.33Fe 2As2 probed by polarized inelastic neutron scattering
• Spin correlations in the parent phase of Li${}_{1-x}$Fe${}_x$ODFeSe
• Hall resistivity correlations in disordered electron-doped Nd${}_{2-x}$Ce${}_x$CuO${}_{4+\delta }$ films
• Doping effect on the evolution of the pairing symmetry in n-type superconductor near antiferromagnetic phase boundary
• Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor (Li${}_{0.8}$Fe${}_{0.2}$)ODFeSe ($T_c$ = 41 K)
• Momentum and doping dependence of spin excitations in electron-doped cuprate superconductors
• The commensurate magnetic excitations induced by band-splitting and Fermi surface topology in n-type Cuprates