Simulation of experimental results on high-Tc superconductors: A phenomenological model

Anna Maria Cucolo; Canio Noce; Alfonso Romano

doi:10.1103/PhysRevB.53.6764

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Simulation of experimental results on high-Tc superconductors: A phenomenological model

Anna Maria Cucolo, Canio Noce, Alfonso Romano

DOI 10.1103/PhysRevB.53.6764 · Physical Review B

T1

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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. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	unknown