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Regensburg 2004 – scientific programme

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TT: Tiefe Temperaturen

TT 2: Supraleitung: Mechanismen, Phasendiagramm, konkurrierende Ordnungen

TT 2.4: Talk

Monday, March 8, 2004, 12:15–12:30, H20

Possible isotope effect on the resonance peak formation in high-Tc cuprates — •Ilya Eremin1, Mikhail Eremin2, and Oleg Kamaev21Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin — 2Physics Department, Kazan State University, 420008 Kazan, Russian Federation

Within effective tJ Hamiltonian we analyze the influence of electronic correlations and electron-phonon interaction on the dynamical spin susceptibility in layered cuprates. We find an isotope effect on the resonance peak in the magnetic spin susceptibility, Im χ(q,ω), seen by inelastic neutron scattering. It results from both the electron-phonon coupling and the electronic correlation effects taken into account beyond random phase approximation(RPA) scheme. We find at optimal doping the isotope coeffiecient αres ≈ 0.4 which can be further tested experimentally.

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