Thermal transport properties of YBa2Cu3O7 superconductors
C. Uher, A. B. Kaiser
DOI 10.1103/PhysRevB.36.5680 · Physical Review B
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Abstract
We have measured the thermal conductivity, thermopower, Hall constant, and resistivity of a YBa2Cu3O7 high-Tc superconductor. The thermal conductivity shows a striking increase below the transition temperature Tc, which we ascribe to an increase in lattice conduction due to a reduction in the scattering of phonons by holes as superconducting pairs form. This property, and the others we have measured, are consistent with ordinary metallic conduction mechanisms with short phonon and carrier free paths, and a strong interaction of phonons with a small density of hole carriers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure unresolved | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure unresolved | onset |
| La1.8Sr0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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