Electronic correlations in the superconductorwith low carrier density
- 5 May 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 77 (17), 174503
- https://doi.org/10.1103/physrevb.77.174503
Abstract
The crystal structure and numerous normal and superconducting state properties of layered tetragonal LaFeAsO, with F doping of , are reported. Resistivity measurements give an onset transition temperature , and low field magnetic susceptibility data indicate bulk superconductivity. In applied magnetic field, analysis of the resistive transition results in a critical field and a coherence length . An upper limit for the electron carrier concentration of is inferred from the Hall data just above . Strong electron-electron correlations are suggested from temperature-dependent resistivity, Seebeck coefficient, and thermal conductivity data. Anomalies near are observed in both Seebeck coefficient and thermal conductivity data.
Keywords
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