Magnetic Order in YBa${}_2$Cu${}_3$O${}_{6+x}$ Superconductors

Abstract

Polarized and unpolarized neutron diffraction has been used to search for magnetic order in YBa${}_2$Cu${}_3$O${}_{6+x}$ superconductors. Most of the measurements were made on a high quality crystal of YBa${}_2$Cu${}_3$O${}_{6.6}$. It is shown that this crystal has highly ordered ortho-II chain order, and a sharp superconducting transition. Inelastic scattering measurements display a very clean spin-gap and pseudogap with any intensity at 10 meV being 50 times smaller than the resonance intensity. The crystal shows a complicated magnetic order that appears to have three components. A magnetic phase is found at high temperatures that seems to stem from an impurity with a moment that is in the $a$-$b$ plane, but disordered on the crystal lattice. A second ordering occurs near the pseudogap temperature that has a shorter correlation length than the high temperature phase and a moment direction that is at least partly along the c-axis of the crystal. Its moment direction, temperature dependence, and Bragg intensities suggest that it may stem from orbital ordering of the $d$-density wave (DDW) type. An additional intensity increase occurs below the superconducting transition. The magnetic intensity in these phases does not change noticeably in a 7 Tesla magnetic field aligned approximately along the c-axis. Searches for magnetic order in YBa${}_2$Cu${}_3$O${}_7$ show no signal while a small magnetic intensity is found in YBa${}_2$Cu${}_3$O${}_{6.45}$ that is consistent with c-axis directed magnetic order. The results are contrasted with other recent neutron measurements.

11 pages with 10 figures

References in corpus (7)

• Evolution of the resonance and incommensurate spin fluctuations in superconducting YBa${}_2$Cu${}_3$O${}_{6+x}$
• Antiferromagnetic ordering in superconducting $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6.5}$
• Observation of Magnetic Moments in the Superconducting State of YBa${}_2$Cu${}_3$O${}_{6.6}$
• Neutron Scattering Signature of d-density Wave Order in the Cuprates
• Antiferromagnetic ordering in a 90 K copper oxide superconductor
• Neutron scattering search for static magnetism in oxygen ordered YBa2Cu3O6.5
• The effects of magnetic field on the d-density wave order in the cuprates

Cited by in corpus (51)

• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• Powerlaw optical conductivity with a constant phase angle in high Tc superconductors
• SO(5) Theory of Antiferromagnetism and Superconductivity
• Fermi pockets and quantum oscillations of the Hall coefficient in high temperature superconductors
• Broken time-reversal symmetry in strongly correlated ladder structures
• Hartree-Fock Computation of the High-Tc Cuprate Phase Diagram
• Nernst effect, quasiparticles, and d-density waves in cuprates
• Magnetism and superconductivity in the $t-t^{\prime }-J$ model
• Theory of d-density wave viewed from a vertex model and its implications
• Detection of the Unusual Magnetic Orders in the Pseudogap Region of a High-Temperature Superconducting YBa2Cu3O6.6 Crystal by Muon-Spin Relaxation
• Competing phases in the extended U-V-J Hubbard model near the van Hove fillings
• Competing phases in the extended U-V-J Hubbard model near the van Hove fillings: 2-patch approach
• Electronically competing phases and their magnetic field dependence in electron-doped nonsuperconducting and superconducting Pr0.88LaCe0.12CuO4
• Competing order, Fermi surface reconstruction, and quantum oscillations in underdoped high temperature superconductors
• Effect of a magnetic field on the long-range magnetic order in insulating Nd2CuO4, nonsuperconducting and superconducting Nd1.85Ce0.15CuO4
• Sharp signature of DDW quantum critical point in the Hall coefficient of the cuprates
• Polarized Neutron Measurement of Magnetic Order in YBa2Cu3O6.45
• Precision Search for Magnetic Order in the Pseudogap Regime of La2-xSrxCuO4 by Muon Spin Relaxation
• Absence of Coexistence of Superconductivity and Antiferromagnetism of the Hole-Doped Two-Dimensional Extended $t-J$ Model
• Incipient order in the t-J model at high temperatures
• Global Phase Diagram of the High Tc Cuprates
• Resolution of two apparent paradoxes concerning quantum oscillations in underdoped high-$T_c$ superconductors
• Local density of states of a d-wave superconductor with inhomogeneous antiferromagnetic correlations
• Staggered Flux State in Two-Dimensional Hubbard Models
• Dimensionality of superconductivity in the infinite-layer high-temperature cuprate Sr0.9M0.1CuO2 (M = La, Gd)
• Antiferromagnetic properties of a water vapor-inserted $YB{a}_{2}C{u}_3{O}_{6.5}$ compound studied by NMR, NQR and $\mu$ SR
• Superfluid Suppression in d-Wave Superconductors due to Disordered Magnetism
• Novel results in STM, ARPES, HREELS, Nernst, neutron, Raman, and isotope substitution experiments and their relation to bosonic modes and charge inhomogeneity, from perspective of negative-Ueff boson-fermion modelling of HTSC
• Study of gossamer superconductivity and antiferromagnetism in the t-J-U model
• Spin-orbit coupling induced magnetism in the $d$-density wave phase of La${}_{2-x}$Ba${}_x$CuO${}_4$ superconductors
• Band-Renormalization Effects and Predominant Antiferromagnetic Order in Two-Dimensional Hubbard Model
• Staggered flux state of electron in two-dimensional t-J model
• Modulation of the local density of states within the $d$-density wave theory in the underdoped cuprates
• Search for the existence of circulating currents in high-$T_c$ superconductors using the polarized neutron scattering technique
• Orbital currents and charge density waves in a generalized Hubbard ladder
• Robustness of d-Density Wave Order to Nonmagnetic Impurities
• Quasiparticle Nernst effect in the cuprate superconductors from the d-density wave theory of the pseudogap phase
• Short-coherence length superconductivity in the Attractive Hubbard Model in three dimensions
• Quantum oscillations in $\mathrm{YB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{6+\delta }$ from an incommensurate $d$-density wave order
• Emergence of charge order in a staggered loop-current phase of cuprate high-temperature superconductors
• Infrared Hall angle in the $d$-density wave state: a comparison of theory and experiment
• Mean-field thermodynamic quantum time-space crystal: spontaneous breaking of time-translation symmetry in a macroscopic fermion system
• Magnetic breakdown and quantum oscillations in electron-doped high temperature superconductor $\mathrm{N}{\mathrm{d}}_{2-\mathrm{x}}\mathrm{C}{\mathrm{e}}_{\mathrm{x}}\mathrm{Cu}{\mathrm{O}}_4$
• Charge and current orders in the spin-fermion model with overlapping hot spots
• Amplitude mode of the $d$-density wave state and its relevance to high-$T_c$ cuprates
• Downward shift of infrared conductivity spectral weight at the DDW transition: role of anisotropy
• Effective interaction in a non-Fermi liquid conductor and spin correlations in under-doped cuprates
• Coexistence of d_{x^2-y^2}-Wave Superconductivity and Antiferromagnetism Induced by a Staggered Field
• Random field disorder and charge order driven quantum oscillations in cuprates
• Bosonic mode interpretation of novel STM and related experimental results, within boson-fermion modelling of HTSC Materials
• Nontrivial behavior of the Fermi arc in the staggered-flux ordered phase