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Detailed Structure of the Magnetic Excitation Spectra of YBa<sub>2</sub>Cu<sub>3</sub>O<sub><i>y</i></sub> and Its Implication on the Physical Characteristics of the Electron System
Detailed structure of the magnetic excitation spectra x"(q,w) of the superconducting oxide YBa2Cu3O6.5(the transition temperature Tc ~ 52 K) in the wave vector (q)- and the energy(w)-space, and its temperature (T) dependence have been studied. By adopting an effective energy dispersion of the quasi particles which can reproduce the shape …