Thermal conductivity and superconductivity in EuBa2Cu3O7−x

M. A. Izbizky; M. Núñez Regueiro; P. Esquinazi; C. Fainstein

doi:10.1103/PhysRevB.38.9220

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Thermal conductivity and superconductivity in EuBa2Cu3O7−x

M. A. Izbizky, M. Núñez Regueiro, P. Esquinazi, C. Fainstein

DOI 10.1103/PhysRevB.38.9220 · Physical Review B

T1

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Abstract

We have measured the thermal conductivity κ from 2 to 200 K in the superconducting ceramic EuBa2Cu3O7−x observing an anomaly at the superconducting transition temperature Tc. Using general arguments and approximations, and supposing that the electrical resistivity is due to electron-phonon interaction, we separate quantitatively the different contributions to κ. The "observed" electron-limited phonon conductivity fairly follows the Bardeen-Rickayzen-Tewordt theory and a Bardeen-Cooper-Schrieffer-like energy gap with 2Δ(0)kBTc=3.3±0.7, in agreement with published data from other kinds of measurements.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
EuBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	midpoint
EuBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	onset
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown