Thermoelectric studies of KxFe2−ySe2 indicating a weakly correlated superconductor
Kefeng Wang (王克锋), Hechang Lei (雷和畅), C. Petrovic
DOI 10.1103/PhysRevB.83.174503 · Physical Review B
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Abstract
We report thermal transport properties of a KxFe2−ySe2 superconducting single crystal. A peak anomaly in the thermal conductivity is observed at nearly TC/2, attributed to phonons. The thermoelectric power above Tc exhibits nearly linear behavior and could be described well by the carrier diffusion mechanism in a wide temperature range. The zero-temperature extrapolated thermoelectric power is smaller than the value in typical strongly correlated superconductors, implying a large normalized Fermi temperature. These findings indicate that KxFe2−ySe2 is a weakly or intermediately correlated superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| KxFe2-ySe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32 | Pressure not reported | onset |
| K0.65Fe1.41Se2.00 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.8 | Pressure not reported | zero_resistance |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| SmO1-xFxFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure not reported | unknown |
| Gd1-xThxFeAsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56.3 | Pressure not reported | unknown |
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