Electronic correlations in the superconductor LaFeAsO0.89F0.11 with low carrier density
Athena S. Sefat, Michael A. McGuire, Brian C. Sales, Rongying Jin, Jane Y. Howe, David Mandrus
DOI 10.1103/PhysRevB.77.174503 · Physical Review B
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Abstract
The crystal structure and numerous normal and superconducting state properties of layered tetragonal (P4∕nmm) LaFeAsO, with F doping of ≈11%, are reported. Resistivity measurements give an onset transition temperature Tc=28.2K, and low field magnetic susceptibility data indicate bulk superconductivity. In applied magnetic field, analysis of the resistive transition results in a critical field Hc2≈30T and a coherence length ξGL≈35Å. An upper limit for the electron carrier concentration of 1×1021cm−3 is inferred from the Hall data just above Tc. Strong electron-electron correlations are suggested from temperature-dependent resistivity, Seebeck coefficient, and thermal conductivity data. Anomalies near Tc are observed in both Seebeck coefficient and thermal conductivity data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO0.89F0.11 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28.2 | Pressure not reported | onset |
| LaFeAsO0.89F0.11 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 27.5 | Pressure not reported | onset |
| LaFePO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | unknown |
| LaNiPO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| LaFeAsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
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