Energy dependence of commensurate neutron scattering peak in doped two-leg ladder antiferromagnet Sr_{14-x}Ca_{x}Cu_{24}O_{41}

Abstract

The dynamical spin response of doped two-leg ladder antiferromagnets is investigated based on the fermion-spin approach. Our calculations clearly demonstrate a crossover from the incommensurate antiferromagnetism in the weak interchain coupling regime to commensurate spin fluctuation in the strong interchain coupling regime. In particular, the nuclear spin-lattice relaxation rate extracted from the commensurate spin fluctuation decreases exponentially with decreasing temperatures. The behaviors of the spin dynamics in the strong coupling regime are quantitatively close to the experimental results of Sr_{14-x}Ca_{x}Cu_{24}O_{41}.

arXiv comment13 pages, Revtex, four figures are included

References in corpus (17)

• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Experiments on Ladders Reveal a Complex Interplay between a Spin-Gapped Normal State and Superconductivity
• Spin-ladders with spin gaps: A description of a class of cuprates
• Evolution of the resonance and incommensurate spin fluctuations in superconducting YBa${}_2$Cu${}_3$O${}_{6+x}$
• Superconductivity in a Quasi One Dimensional Spin Liquid
• Low temperature spin diffusion in the one-dimensional quantum $O(3)$ nonlinear $\sigma$-model
• The ground state of the two-leg Hubbard ladder: a density--matrix renormalization group study
• Fermion-Spin Transformation to Implement the Charge-Spin Separation
• Spin Gap Fixed Points in the Double Chain Problem
• Singlet pairing in the double chain t-J model
• Spin dynamics of SrCu${}_2$O${}_3$ and the Heisenberg ladder
• Theory of Photoemission from the Copper Oxide Material
• Doping and temperature dependence of incommensurate antiferromagnetism in underdoped lanthanum cuprates
• Nuclear spin relaxation rates in two-leg spin ladders
• Staggered-spin contribution to nuclear spin-lattice relaxation in two-leg antiferromagnetic spin-1/2 ladders
• Bipolaronic charge excitations in t-J two-leg ladders
• Convergence of energy-dependent incommensurate antiferromagnetic neutron scattering peaks to commensurate resonance in underdoped bilayer cuprates

Cited by in corpus (3)

• Kinetic-energy driven superconductivity in cuprate superconductors
• Superconductivity in doped two-leg ladder cuprates
• Thermal conductivity in the doped two-leg ladder antiferromagnet Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$