LiFeP: A nodal superconductor with an unusually large ΔCTc
J. S. Kim, L. Y. Xing, X. C. Wang, C. Q. Jin, G. R. Stewart
DOI 10.1103/PhysRevB.87.054504 · Physical Review B
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Abstract
The specific heat of improved quality polycrystalline LiFeP, Tc≈5 K, was measured down to 0.4 K. The results indicate that this is another iron-based nodal superconductor (in addition to KFe2As2, Tc≈4 K) where the discontinuity in the specific heat ΔC at Tc violates the global trend in ΔC/Tc with Tc for the iron-based superconductors (IBSs), first pointed out by Bud'ko, Ni, and Canfield [Phys. Rev. B 79, 220516(R) (2009)]. Thus, it may be possible that there exists a minimum of two different kinds of IBSs distinguished by their low Tc, nodal, and ΔC/Tc behavior.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LiFeP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| LiFeP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.86 | Pressure not reported | midpoint |
| KFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | unknown |
| LiFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | unknown |
| BaFe2(As0.7P0.3)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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