Magnetic Excitations of the Diagonal Incommensurate Phase in Lightly-Doped La2-xSrxCuO4

Abstract

We present inelastic neutron scattering experiments on a single-domain crystal of lightly-doped La1.96Sr0.04CuO4. We find that the magnetic excitation spectrum in this insulating phase with a diagonal incommensurate spin modulation is remarkably similar to that in the superconducting regime, where the spin modulation is bond parallel. In particular, we find that the dispersion slope at low energy is essentially independent of doping and temperature over a significant range. The energy at which the excitations cross the commensurate antiferromagnetic wave vector increases roughly linearly with doping through the underdoped regime.

arXiv comment4 pages, 5 figures

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• Hour-glass magnetic spectrum in an insulating, hole-doped antiferromagnet
• Disorder-induced freezing of dynamical spin fluctuations in underdoped cuprates
• Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides La${}_{2-x}$Sr${}_x$CoO${}_4$
• Superconductivity in high-$T_c$ and related strongly correlated systems from variational perspective: Beyond mean field theory
• High-energy magnetic excitations in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ studied by neutron and resonant inelastic X-ray scattering
• Hour-glass magnetic spectrum in a stripe-less insulating transition metal oxide
• Electronic polymers and soft-matter-like broken symmetries in underdoped cuprates
• Incommensurate spin correlations in highly oxidized cobaltates La${}_{2-x}$Sr${}_x$CoO${}_4$
• Doping dependence of the $(\pi ,\pi )$ shadow band in La-based cuprates studied by angle-resolved photoemission spectroscopy
• Spin-charge interplay in electronic liquid crystals: fluctuating spin stripe driven by charge nematic
• Stripes in cuprate superconductors: Excitations and dynamic dichotomy
• Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO4
• Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d
• Two Dimensional Incommensurate and Three Dimensional Commensurate Magnetic Order and Fluctuations in $L{a}_{2-x}B{a}_{x}Cu{O}_4$
• Incommensurability and spin excitations of diagonal stripes in cuprates
• Superconducting pairing and the pseudogap in nematic striped La2-xSrxCuO4
• Spin-phonon coupling, q-dependence of spin excitations and high-T${}_C$ superconductivity from band models
• Bands, spin fluctuations and traces of Fermi surfaces in angle-resolved photoemission intensities for high-$T_C$ cuprates
• Neutron Scattering Studies of Spin-Phonon Hybridization and Superconducting Spin-Gaps in High Temperature Superconductor $L{a}_{2-x}(Sr,Ba{)}_{x}Cu{O}_4$
• Energy-dependent crossover from anisotropic to isotropic magnetic dispersion in lightly-doped La1.96Sr0.04CuO4
• Colossal transverse magnetoresistance due to nematic superconducting phase fluctuations in a copper oxide
• The Hour-Glass Magnetic Spectrum Arising from a Striped, Cluster Spin Glass Ground State in La1.75Sr0.25CoO4
• Transport Properties of Stripe-Ordered High Tc Cuprates
• Spin excitations coupled with lattice and charge dynamics in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Renormalization of Commensurate Magnetic Peak in Ni-doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$
• Opening a nodal gap by fluctuating spin-density-wave in lightly doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Gradual emergence of superconductivity in underdoped LSCO