Strong pairbreaking in anisotropic superconductors
V. G. Kogan
DOI 10.1103/PhysRevB.81.184528 · Physical Review B
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Abstract
Abrikosov-Gor’kov work on pairbreaking in isotropic materials is generalized to anisotropic Fermi surfaces and order parameters. New scaling relations for states with a strong pairbreaking are found for the specific-heat jump ΔC∝Tc3; for the penetration depth that deviates from the zero-T value as Δλ=βT2 at low temperatures with β∝Tc−3, and for the slopes of the upper critical fields Hc2′(Tc)∝Tc. A remarkably simple relation between these at first sight unrelated quantities is found: ΔCβ2Tc4/|Hc2′|=ϕ0/16π2 is a universal constant. The predictions are checked on CeCoIn5 and the possibility to apply them to iron-based materials is discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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