Nature of the magnetic stripes in fully oxygenated La${}_2$CuO${}_{4+y}$

Abstract

We present triple-axis neutron scattering studies of static and dynamic magnetic stripes in an optimally oxygen-doped cuprate superconductor, La${}_2$CuO${}_{4+y}$, which exhibits a clean superconducting transition at $T_{\mathrm{c}}=42$ K. Polarization analysis reveals that the magnetic stripe structure is equally represented along both of the tetragonal crystal axes and that the fluctuating stripes display significant weight for in-plane as well as out-of-plane spin components. Both static magnetic order as well as low-energy fluctuations are fully developed in zero applied magnetic field and the low-energy spin fluctuations at $\hslash \omega =0.3-10$ meV intensify upon cooling. We interpret this as an indication that superconductivity and low-energy spin fluctuations co-exist microscopically in spatial regions which are separated from domains with static magnetic order.

16 pages, 6 figures

References in corpus (19)

• Theory of Intertwined Orders in High Temperature Superconductors
• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
• Charge density wave fluctuations in La2-xSrxCuO4 and their competition with superconductivity
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Evidence for unusual superconducting correlations coexisting with stripe order in La(1.875)Ba(0.125)CuO(4)
• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Optimum inhomogeneity of local lattice distortions in La2CuO4+y
• Rotated stripe order and its competition with superconductivity in La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Field-induced soft-mode quantum phase transition in La${}_{1.855}$Sr${}_{0.145}$CuO${}_4$
• Magnetic-field-induced spin excitations and renormalized spin gap of the underdoped superconductor La${}_{1.895}$Sr${}_{0.105}$CuO${}_4$
• Magnetic field induced enhancement of spin-order peak intensity in La(1.875)Ba(0.125)CuO(4)
• Incommensurate Spin Ordering and Fluctuations in underdoped La_{2-x}Ba_{x}CuO_{4}
• Bulk charge stripe order competing with superconductivity in La2-xSrxCuO4 (x=0.12)
• Effects of impurities and vortices on the low-energy spin excitations in high-Tc materials
• Flux pinning and phase separation in oxygen rich La2-xSrxCuO4+y system
• Field-induced inter-planar correlations in the high-temperature superconductor La1.88Sr0.12CuO4
• Non-destructive characterisation of dopant spatial distribution in cuprate superconductors
• Dislocations as a boundary between charge density wave and oxygen rich phases in a cuprate high temperature superconductor

Cited by in corpus (4)

• Plane wave implementation of the magnetic force theorem for magnetic exchange constants: Application to bulk Fe, Co and Ni
• Designing the stripe-ordered cuprate phase diagram through uniaxial-stress
• Tilted stripes origin in ${\mathrm{La}}_{1.88}{\mathrm{Sr}}_{0.12}{\mathrm{CuO}}_4$ revealed by anisotropic next-nearest neighbor hopping
• Gradual emergence of superconductivity in underdoped LSCO