Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d

Abstract

We use inelastic neutron scattering to explore the evolution of the low energy spin dynamics in the electron-doped cuprate Pr0.88LaCe0.12CuO4-d (PLCCO) as the system is tuned from its nonsuperconducting, as-grown antiferromagnetic (AF) state into an optimally-doped superconductor (Tc~24 K) without static AF order. The low temperature, low energy response of the spin excitations in under-doped samples is coupled to the presence of the AF phase, whereas the low-energy magnetic response for samples near optimal Tc exhibits spin fluctuations surprisingly insensitive to the sample temperature. This evolution of the low energy excitations is consistent with the influence of a quantum critical point in the phase diagram of PLCCO associated with the suppression of the static AF order. We carried out scaling analysis of the data and discuss the influence of quantum critical dynamics in the observed excitation spectrum.

11 Pages, 10 Figures. Minor changes to the text. Accepted by Phys. Rev. B and to appear in October 1st issue

References in corpus (26)

• Locally critical quantum phase transitions in strongly correlated metals
• Spin waves and electronic interactions in La2CuO4
• Onset of antiferromagnetism in heavy fermion metals
• Quantum Magnetic Excitations from Stripes in Copper-Oxide Superconductors
• Order and quantum phase transitions in the cuprate superconductors
• Evolution of the resonance and incommensurate spin fluctuations in superconducting YBa${}_2$Cu${}_3$O${}_{6+x}$
• The Magnetic Excitation Spectrum and Thermodynamics of High-$T_c$ Superconductors
• Universal quantum critical dynamics of two-dimensional antiferromagnets
• Evidence for a quantum phase transition in the electron-doped cuprate Pr2-xCexCuO4+d from Hall and resistivity measurements
• Spin-fermion model near the quantum critical point: one-loop renormalization group results
• A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4
• Universal Dispersive Excitations in the High-Temperature Superconductors
• Evidence for a generic novel quantum transition in high-Tc cuprates
• Commensurate spin dynamics in the superconducting state of an electron-doped cuprate superconductor
• Resonance in the electron-doped high-Tc superconductor Pr0.88LaCe0.12CuO(4-delta)
• Magnetic and superconducting phase diagram of electron-doped Pr${}_{1-x}$LaCe${}_x$CuO${}_4$
• Superexchange coupling and spin susceptibility spectral weight in undoped monolayer cuprates
• Infrared Properties of Electron Doped Cuprates: Tracking Normal State Gaps and Quantum Critical Behavior in Pr(2-x)Ce(x)CuO(4)
• Magnetic Excitations and their energy change available to Superconducting Condensation in Optimally Doped YBa${}_2$Cu${}_3$O${}_{6.95}$
• High Energy Spin Excitations in Electron-Doped Superconducting Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$ with $T_c=21$ K
• Electronically competing phases and their magnetic field dependence in electron-doped nonsuperconducting and superconducting Pr0.88LaCe0.12CuO4
• "Spin-Flop" Transition and Anisotropic Magnetoresistance in Pr_{1.3-x}La_{0.7}Ce_{x}CuO_{4}: Unexpectedly Strong Spin-Charge Coupling in Electron-Doped Cuprates
• Effect of a magnetic field on the long-range magnetic order in insulating Nd2CuO4, nonsuperconducting and superconducting Nd1.85Ce0.15CuO4
• Electronic inhomogeneity and competing phases in electron-doped superconducting Pr0.88LaCe0.12CuO4
• Quantum Critical Scaling and origin of Non-Fermi-Liquid behavior in Sc${}_{1-x}$U${}_x$Pd${}_3$
• Novel dynamic scaling regime in hole-doped La2CuO4

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• Spin dynamics near the critical doping in weakly-superconducting underdoped YBa2Cu3O6.35 (Tc=18K)
• Resonance in Optimally Electron-Doped Superconductor Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_{4-\delta }$
• The resonance peak in the electron-doped cuprate superconductors
• Electron-Spin Excitation Coupling in an Electron Doped Copper Oxide Superconductor
• Transport anomalies and quantum criticality in electron-doped cuprate superconductors
• Destruction of Neel order and appearance of superconductivity in electron-doped cuprates by oxygen annealing process
• Ordered magnetism in the intrinsically decorated $j{}_{\mathrm{eff}}$ = $\frac{1}{2}$ $\alpha$-CoV${}_3$O${}_8$
• Doping and energy evolution of spin dynamics in the electron-doped cuprate superconductor Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$
• Magnetic excitations in hole-doped Sr2IrO4: A comparison with electron-doped cuprates
• Pseudogap in electron-doped cuprates: Strong correlation leading to band splitting
• Vortex Dynamics and Phase Diagram in the Electron Doped Cuprate Superconductor Pr${}_{0.87}$LaCe${}_{0.13}$CuO${}_4$
• Possible manifestation of spin fluctuations in the temperature behavior of resistivity in Sm_{1.85}Ce_{0.15}CuO_4 thin films
• Pressure tuning of structure, superconductivity and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1)
• Electronic structure of the electron-doped cuprate superconductors
• Freezing of spin dynamics in underdoped cuprates
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Muon spin relaxation study of the spin correlation in the overdoped regime of electron-doped high-Tc cuprate superconductors
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates
• Correlation between the strength of low-temperature T-linear normal-state resistivity and $T_{\mathrm{c}}$ in overdoped electron-doped cuprate superconductors
• Momentum and doping dependence of spin excitations in electron-doped cuprate superconductors