Spin pseudogap in Ni-doped SrCuO2

Abstract

The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni-impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ~ 8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the exprimental data measured in the temperature range 2-300 K, and allows to represent the momentum-integrated dynamic structure factor in a universal scaling form.

5 pages, 3 figures

References in corpus (5)

• Finite temperature transport in disordered Heisenberg chains
• Chain breaks and the susceptibility of Sr_2Cu_{1-x}Pd_xO_{3+δ} and other doped quasi one-dimensional antiferromagnets
• Thermodynamics of impurities in the anisotropic Heisenberg spin-1/2 chain
• Disorder-induced Spin Gap in the Zigzag Spin-1/2 Chain Cuprate Sr_{0.9}Ca_{0.1}CuO_2
• Ordering in weakly coupled random singlet spin chains

Cited by in corpus (28)

• Quantum spin chains with frustration due to Dzyaloshinskii-Moriya interactions
• Heat transport of cuprate-based low-dimensional quantum magnets with strong exchange coupling
• Scaling of temporal correlations in an attractive Tomonaga-Luttinger spin liquid
• Emergent quasi-one-dimensionality in a kagomé magnet: A simple route to complexity
• Particle-hole asymmetry in the dynamical spin and charge structure factors of the corner-shared one-dimensional cuprates
• Multi-spinon and holon excitations probed by resonant inelastic x-ray scattering on doped one-dimensional antiferromagnets
• Heat Transport in Spin Chains with Weak Spin-Phonon Coupling
• Spin Gap in the Single Spin-1/2 Chain Cuprate Sr${}_{1.9}$Ca${}_{0.1}$CuO${}_3$
• Finite-size effects in the quasi-one-dimensional quantum magnets Sr${}_2$CuO${}_3$, Sr${}_2$Cu${}_{0.99}$M${}_{0.01}$O${}_3$ (M = Ni, Zn), and SrCuO${}_2$
• Spin dynamics of coupled spin ladders near quantum criticality in Ba2CuTeO6
• Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets
• Crystal growth of the non-magnetic Zn${}^{2+}$ and magnetic Co${}^{2+}$ doped quasi one-dimensional spin chain compound SrCuO${}_2$ using the travelling solvent floating zone method
• Na-ion dynamics in Quasi-1D compound NaV2O4
• Impact of strong disorder on the static magnetic properties of the spin-chain compound BaCu2SiGeO7
• Impurities in weakly coupled quantum spin chains Sr${}_2$CuO${}_3$ and SrCuO${}_2$
• The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO${}_2$ probed by NMR
• Spin pseudogap in the $S=\frac{1}{2}$ chain material Sr${}_2$CuO${}_3$ with impurities
• The dynamic structure factor in impurity-doped spin chains
• Effects of quantum impurity spins on the magnetic properties of zigzag and linear spin chains
• Magnetic ordering in the ultra-pure site-diluted spin chain materials SrCu${}_{1-x}$Ni${}_x$O${}_2$
• Suppression of the impurity-induced local magnetism by the opening of a spin pseudogap in Ni-doped Sr${}_2$CuO${}_3$
• Quantum critical dynamics and scaling in one-dimensional antiferromagnets
• LT-scaling in depleted quantum spin ladders
• Propagation of defects in doped magnetic materials of different dimensionality
• Observation of a gapped phase in the one-dimensional $S=\frac{1}{2}$ Heisenberg antiferromagnetic chain Cu(Ampy)ClBr
• Defect-induced spin textures in magnetic solids
• Local structures and local exchange interactions in doped magnetic materials of different dimensionality
• Spin-$S$ impurities with XXZ anisotropy in a spin-1/2 Heisenberg chain