title: Toward a theory for low-frequency spin dynamics in plane copper oxide superconductors: crossover from localized spins to weak coupling charge carriers with doping.
abstract: We explore for all wavevectors through the Brillouin zone the dynamic spin susceptibility χ(total)(+,-)(ω, q) that takes into account the interplay of localized and itinerant charge carriers. The imaginary part, Imχ(total)(+,-)(ω, q), has peaks at the antiferromagnetic wavevector Q = (π, π) and a diffusive-like, extremely narrow and sharp peak (symmetric ring of maxima |q| = q(0)) at very small wavevectors Q(0) is proportional to w/J ≈ 10(-6) with the nuclear magnetic/quadrupole resonance frequency ω and the superexchange coupling constant J. We demonstrate the capability of Imχ(total)(+,-)(ω, q) for plane copper (63)(1/T(1)) and oxygen (17)(1/T(1)) nuclear spin-lattice relaxation rate calculations from carrier free right up to optimally doped La(2 - x)Sr(x)CuO(4) and obtain the basic features of temperature and doping behavior for (63)(1/T(1)) in agreement with experimental observations.
authors.affiliation: Magnetic Radiospectroscopy Laboratory, Institute of Physics, Kazan Federal University, Kazan, Russia. Larionov.MRSLab@mail.ru
authors.forename: Igor A
authors.initials: IA
authors.lastname: Larionov
mesh_terms: D003198:Computer Simulation; D003300:Copper / Q000737:chemistry*; D004553:Electric Conductivity; D004579:Electron Transport; D008956:Models, Chemical
chemical_list: D003300:Copper; C030973:cupric oxide