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.

4 pages, 5 figures

References in corpus (8)

• Electronic liquid crystal state in the high-temperature superconductor YBCO(6.45)
• Spin dynamics in the pseudogap state of a high-temperature superconductor
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Magnetic neutron scattering in hole doped cuprate superconductors
• Spin Waves in Striped Phases
• Homogeneous versus Spiral Phases of Hole-doped Antiferromagnets: A Systematic Effective Field Theory Investigation
• Effective action of the weakly doped t-J model and spin-wave excitations in the spin-glass phase of La_{2-x}Sr_xCuO_4
• The Fincher-Burke spin excitations and omega/T scaling in the insulating 5% Sr-doped La2CuO4

Cited by in corpus (14)

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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
• Stripes in cuprate superconductors: Excitations and dynamic dichotomy
• Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d
• Spin-phonon coupling, q-dependence of spin excitations and high-T${}_C$ superconductivity from band models
• 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
• Spin excitations coupled with lattice and charge dynamics in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Gradual emergence of superconductivity in underdoped LSCO