Suppression of the superconducting gap and the spin-fluctuation gap of YBa2Cu3Oy (y=7.0 and 6.76) by Zn substitution as measured by Gd3+ electron-spin resonance

Janossy, A [Jánossy, András (Szilárdtestfizika), szerző] Budapesti Műszaki Egyetem; Cooper, Jr; Brunel, LC; Carrington, A

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    The local susceptibility around Zn atoms in Gd-doped YBa2(Cu0.97Zn0.03)3Oy has been measured by the electron-spin-resonance Knight shift of Gd3+ at 245 GHz. The magnitude and distribution of the shifts are compared with the corresponding data for compounds with no Zn. For both y = 7. 0 and 6.76 the full density of states (corresponding to the high-temperature normal state of the pure y = 7.0 compound) is restored at the first-neighbor sites of Zn atoms irrespective of whether the material is superconducting or not. This shows that both the superconducting gap and the spin-fluctuation gap are locally suppressed by Zn substitution.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2024-04-17 17:02