Consistency with anomalous electron-phonon interactions of the thermopower of high-Tc superconductors
A. B. Kaiser, G. Mountjoy
DOI 10.1103/PhysRevB.43.6266 · Physical Review B
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Abstract
We show that the hitherto puzzling in-plane thermopower of YBa2Cu3O7−y and other high-Tc superconductors can be understood in terms of existing metallic-diffusion thermopower theory: The observed behavior is similar to that already seen in ordinary metallic alloys, except for the anomalously large size of the electron-phonon enhancement effect. The data are therefore consistent with a very large electron-phonon coupling for some carriers (arising, for example, from anharmonic phonons associated with structural instabilities). The measured out-of-plane thermopower in several single crystals is also consistent with our model, but with a smaller electron-phonon coupling.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Cu1.8Mo6S5Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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