Neutron scattering study of spin ordering and stripe pinning in superconducting La${}_{1.93}$Sr${}_{0.07}$CuO${}_4$

Abstract

The relationships among charge order, spin fluctuations, and superconductivity in underdoped cuprates remain controversial. We use neutron scattering techniques to study these phenomena in La${}_{1.93}$Sr${}_{0.07}$CuO${}_4$, a superconductor with a transition temperature of $T_c=20$~K. At $T\ll T_c$, we find incommensurate spin fluctuations with a quasielastic energy spectrum and no sign of a gap within the energy range from 0.2 to 15 meV. A weak elastic magnetic component grows below $\sim 10$~K, consistent with results from local probes. Regarding the atomic lattice, we have discovered unexpectedly strong fluctuations of the CuO${}_6$ octahedra about Cu-O bonds, which are associated with inequivalent O sites within the CuO${}_2$ planes. Furthermore, we observed a weak elastic $(3\bar{3}0)$ superlattice peak that implies a reduced lattice symmetry. The presence of inequivalent O sites rationalizes various pieces of evidence for charge stripe order in underdoped \lsco. The coexistence of superconductivity with quasi-static spin-stripe order suggests the presence of intertwined orders; however, the rotation of the stripe orientation away from the Cu-O bonds might be connected with evidence for a finite gap at the nodal points of the superconducting gap function.

13 pages, 11 figures; accepted version

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Cited by in corpus (33)

• Cuprate superconductors as viewed through a striped lens
• Charge ordering in superconducting copper oxides
• Pair Density Waves in Superconducting Vortex Halos
• Remarkable Stability of Charge Density Wave Order in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
• Strongly-overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Evidence for Josephson-coupled grains of strongly-correlated superconductor
• Low-energy antiferromagnetic spin fluctuations limit the coherent superconducting gap in cuprates
• Microscopic mechanism for fluctuating pair density wave
• Vortex phase diagram and the normal state of cuprates with charge and spin orders
• Charge-screening role of $c$-axis atomic displacements in YBa${}_2$Cu${}_3$O${}_{6+x}$ and related superconductors
• Unconventional short-range structural fluctuations in cuprate high-$T_c$ superconductors
• Distinct nature of static and dynamic magnetic stripes in cuprate superconductors
• Single domain stripe order in a high-temperature superconductor
• Crystal Symmetry of Stripe Ordered La1.88Sr0.12CuO4
• Cooperative coupling of static magnetism and bulk superconductivity in the stripe phase of La_2-xBa_xCuO_4: Pressure- and doping-dependent studies
• Superconductivity from charge order in cuprates
• Complementary response of static spin-stripe order and superconductivity to non-magnetic impurities in cuprates
• Reinvestigation of crystal symmetry and fluctuations in La${}_2$CuO${}_4$
• Exact solution for finite center-of-mass momentum Cooper pairing
• Evidence for magnetic-field-induced decoupling of superconducting bilayers in La${}_{2-x}$Ca${}_{1+x}$Cu${}_2$O${}_6$
• Magnetic field reveals vanishing Hall response in the normal state of stripe-ordered cuprates
• Electron-phonon coupling and superconductivity in the doped topological-crystalline insulator (Pb${}_{0.5}$Sn${}_{0.5}$)${}_{1-x}$In${}_x$Te
• Short-range charge fluctuations in the two-dimensional Hubbard model
• Staging superstructures in high-$T_c$ Sr/O co-doped La${}_{2-x}$Sr${}_x$CuO${}_{4+y}$
• Engineering Phase Competition Between Stripe Order and Superconductivity in La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Nature of the magnetic stripes in fully oxygenated La${}_2$CuO${}_{4+y}$
• Role of electron correlation and disorder on the electronic structure of layered nickelate (La${}_{0.5}$Sr${}_{0.5}$)${}_2$NiO${}_4$
• The hidden competing phase revealed by first-principles calculations of phonon instability in the nearly optimally doped cuprate La${}_{1.875}$Sr${}_{0.125}$CuO${}_4$
• Charge density waves and pinning by lattice anisotropy in 214 cuprates
• Gapless spin excitations in superconducting La${}_{2-x}$Ca${}_{1+x}$Cu${}_2$O${}_6$ with $T_c$ up to 55 K
• 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
• The Inward Dispersion of the Neutron Scattering Experiments in HTSC Cuprates
• Quasi-Two-Dimensional Quantum Antiferromagnetism in the Distorted Honeycomb Compound KCuIn(PO4)2