Physics – Condensed Matter – Superconductivity
Scientific paper
2011-12-23
Phys. Rev. B 85, 060503(R) (2012)
Physics
Condensed Matter
Superconductivity
4 pages, 3 figures, 1 table
Scientific paper
10.1103/PhysRevB.85.060503
By using high-quality single crystals, we quantitatively compare the transport properties between LiFeAs and LiFeP superconductors with compensated electron and hole carriers. The low-temperature resistivity follows the Fermi-liquid $AT^2$ dependence with a factor of $\sim 3$ difference in the coefficient $A$. This highlights weaker electron correlations in LiFeP, which is consistent with its $\sim 70$ times lower upper critical field than that of LiFeAs. Our analysis of the magneto-transport data indicates that in LiFeP the electron carriers with lighter masses exhibit stronger temperature dependence of inelastic scattering rate than the holes, which is the opposite to the LiFeAs case. This stark difference in the band-dependent inelastic scattering may be relevant to the recently reported contrasting superconducting gap structures in these two superconductors.
Hashimoto Katsumi
Ikeda Hiroaki
Kasahara Satoshi
Matsuda Yuichi
Shibauchi Takasada
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