A model based on a conductance expressed as a superposition of two BCS-like contributions and a linear one is proposed for the analysis of the tunneling spectra of the 90 and 60 K phases of the YBaCuO compounds. A consistent explanation of the experiments, supported by satisfactory quantitative fittings of the experimental data in both the superconducting and the normal state, is presented with a careful study of the role played by the linear term. The possible extension of the model to other copper-oxide superconductors is also discussed. Referring to a simplified one-gap version of the model, theoretical results concerning the behavior of the specific heat and the ultrasonic attenuation coefficients are found to be in good qualitative agreement with the experiments.
Simulation of experimental results on high-T-c superconductors: A phenomenological model
CUCOLO, Anna Maria;NOCE, Canio;ROMANO, Alfonso
1996-01-01
Abstract
A model based on a conductance expressed as a superposition of two BCS-like contributions and a linear one is proposed for the analysis of the tunneling spectra of the 90 and 60 K phases of the YBaCuO compounds. A consistent explanation of the experiments, supported by satisfactory quantitative fittings of the experimental data in both the superconducting and the normal state, is presented with a careful study of the role played by the linear term. The possible extension of the model to other copper-oxide superconductors is also discussed. Referring to a simplified one-gap version of the model, theoretical results concerning the behavior of the specific heat and the ultrasonic attenuation coefficients are found to be in good qualitative agreement with the experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
