Elastic and inelastic light scattering in the Zn- and Ni-doped YBa2Cu3O7

Milan J. Konstantinovic; Rados Gajic; Jovan Konstantinovic

doi:10.1117/12.241740

10 June 1996 Elastic and inelastic light scattering in the Zn- and Ni-doped YBa₂Cu₃O₇

Milan J. Konstantinovic, Rados Gajic, Jovan Konstantinovic

Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241740
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We present the measurements of the elastically scattered 'plasma' lines intensities as well as the Raman spectra of YBa₂(Cu_1-xZn_x)₃O₇ and YBa₂(Cu_1-xNi_x)₃O₇ as a function of the temperature and Zn or Ni content. In the case of elastic scattering we found two anomalies at the temperatures T equals T_c and T equals 150 K. This behavior is related to superconducting transition and indicates either the existence of charge fluctuation in temperature region from T_c to T equals 150 K or some electronic or surface phenomena. Furthermore, we analyzed the temperature dependence of the two Raman modes at 340 cm^-1 and 440 cm^-1. It is found that Zn substantially suppresses the superconductivity-induced phonon anomaly, whereas Ni does not affect it. Moreover, the superconductivity-induced phonon stiffening at the 440 cm^-1 mode completely disappeared with Zn doping. This behavior might be explained considering Zn as a magnetic pair breaker.

Citation Download Citation

Milan J. Konstantinovic, Rados Gajic, and Jovan Konstantinovic "Elastic and inelastic light scattering in the Zn- and Ni-doped YBa₂Cu₃O₇", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241740

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