期刊
PHYSICAL REVIEW B
卷 83, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.174503
关键词
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资金
- US DOE [DE-AC02-98CH10886]
- center for Emergent Supercondcutivity
- Energy Frontier Research Center
- US DOE, office for Basic Energy Science
We report thermal transport properties of a KxFe2-ySe2 superconducting single crystal. A peak anomaly in the thermal conductivity is observed at nearly T-C/2, attributed to phonons. The thermoelectric power above T-c 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.
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