Quasi One-Dimensional Spin Fluctuations in YBa2Cu3O6+x
نویسندگان
چکیده
We study the spin fluctuation of the oxygen deficient planes of YBa2Cu3O6+x. The Cu-O chains that constitute these planes are described by a model that includes antiferromagnetic interactions between spins and Kondo-like scattering of oxygen holes. The spectrum of magnetic excitations shows the presence of incommensurate dynamic fluctuations along the direction of the chains. The presence of itinerant holes is responsible for the existence of important differences between the spin dynamics of this system and that of a quasione-dimensional localized antiferromagnet. We comment on the possibility of experimental observation of these fluctuations. PACS numbers: 75.10.Jm, 75.40.Gb, 74.72.Bk, 61.12.Ex Typeset using REVTEX 1
منابع مشابه
Low-Energy Spin Dynamics of CuO Chains in YBa2Cu3O6+x
We study the spin fluctuation dynamics of Cu-O chains in the oxygen deficient planes of YBa2Cu3O6+x. The chains are described by a model including antiferromagnetic interactions between the spins and Kondo-like scattering of the oxygen holes by the copper spins. There are incommensurate spin fluctuations along the direction of the chains. The dynamic structure factor of this system is qualitati...
متن کاملCalculation of Quasi-one-dimensional Interacting Electron Gas Using the Hartree-Fock Method
In this paper, the Hartree-Fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. The bare coulomb interaction between electrons has been assumed. For this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...
متن کاملElectronic theory for the normal-state spin dynamics in Sr2RuO4: Anisotropy due to spin-orbit coupling
Using a three-band Hubbard Hamiltonian we calculate within the random-phase approximation the spin susceptibility, x(q,v), and nuclear magnetic resonance spin-lattice relaxation rate, 1/T1, in the normal state of the triplet superconductor Sr2RuO4 and obtain quantitative agreement with experimental data. Most importantly, we find that due to spin-orbit coupling the out-of-plane component of the...
متن کاملIntensity correlations in electronic-wave propagation in a disordered medium: The influence of spin-orbit scattering.
We obtain explicit expressions for the correlation functions of transmission and reflection coefficients of coherent electronic waves propagating through a disordered quasi-one-dimensional medium with purely elastic diffusive scattering in the presence of spin-orbit interactions. We find in the metallic regime both large local intensity fluctuations and long-range correlations which ultimately ...
متن کاملUnexpected isotopic effect of a deuteriumed countercation on the spin-Peierls-type transitions in quasi-one-dimensional bis(maleonitriledithiolato)nickelate monoanion spin systems.
Two deuteriumed quasi-one-dimensional (quasi-1D) spin-Peierls-type compounds, 4-X-benzylpyridinium-d(5) bis(maleo-nitriledithiolato)nickelate (the substituent X = Br or Cl), were structurally characterized. Compared with the corresponding non-deuteration compounds, the transition temperature T(C) shifts to higher temperature. The isotopic effect of countercations on T(C) is probably related to ...
متن کامل