Collective excitations below Tc in cuprate superconductors

A. C. Sharma; Ina Kulshrestha

doi:10.1117/12.179178

29 June 1994 Collective excitations below T_c in cuprate superconductors

A. C. Sharma, Ina Kulshrestha

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179178
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

We present a theoretical study of frequency and line shape for collective excitation of charge carriers below T for cuprate superconductors ..IP La SrCuC and like YBa2Cu3()7. using layered electron ga tide1. The collective excitations are studied in the frequency range h 2t QVF< T < T, where A, q. v. and T are respectively the component of wave vector in a—b plane, binding energy of Cooper pair, Fermi velocity and the temperature. The polarizability for a two dimensional fluid comprising of paired as well as unpaired electrons is calculated and used to calculate the imaginary part of inverse dielectric response function, which gives rise to the frequency and line shapes of collective excitations.The plasrnon line shapes of a layered electron gas are found very similar in nature to that of three dimensional electron gas below T.

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A. C. Sharma and Ina Kulshrestha "Collective excitations below T_c in cuprate superconductors", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179178

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