Spin pseudogap in the $S=\frac{1}{2}$ chain material Sr${}_2$CuO${}_3$ with impurities

Abstract

The low energy magnetic excitation spectrum of the Heisenberg antiferromagnetic $S=1/2$ chain system Sr${}_2$CuO${}_3$ with Ni- and Ca-impurities is studied by neutron spectroscopy. In all cases, a defect-induced spectral pseudogap is observed and shown to scale proportionately to the number of scattering centers in the spin chains.

References in corpus (20)

• Quantum criticality and universal scaling of a quantum antiferromagnet
• Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets
• Reduction of ordered moment and Neel temperature of quasi one-dimensional antiferromagnets Sr2CuO3 and Ca2CuO3
• Covalent bonding and magnetism in cuprates
• Spinons in the strongly correlated copper oxide chains in SrCuO2
• Anderson-localization versus delocalization of interacting fermions in one dimension
• Dynamics and transport in random quantum systems governed by strong-randomness fixed points
• Site-Dilution in quasi one-dimensional antiferromagnet Sr2(Cu1-xPdx)O3: reduction of Neel Temperature and spatial distribution of ordered moment sizes
• Dynamics and Transport in Random Antiferromagnetic Spin Chains
• Neel order in doped quasi one-dimensional antiferromagnets
• Boundary susceptibility in the spin-1/2 chain: Curie like behavior without magnetic impurities
• Spin pseudogap in Ni-doped SrCuO2
• 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
• Bond disorder and breakdown of ballistic heat transport in the spin-1/2 antiferromagnetic Heisenberg chain as seen in Ca-doped SrCuO2
• 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${}_2$
• Bond disorder and spinon heat transport in the $S=\frac{1}{2}$ Heisenberg spin chain compound Sr${}_2$CuO${}_3$: from clean to dirty limits
• 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${}_3$

Cited by in corpus (5)

• Spinon Excitations in the Quasi-1D S = 1/2 Chain Cs4CuSb2Cl12
• Impurities in weakly coupled quantum spin chains Sr${}_2$CuO${}_3$ and SrCuO${}_2$
• The dynamic structure factor in impurity-doped spin chains
• Quantum critical dynamics and scaling in one-dimensional antiferromagnets
• LT-scaling in depleted quantum spin ladders