Upper critical field in superconductors and the uncertainty principle: Upper limit to the maximum slope of Hc2

J. Luzuriaga

doi:10.1103/PhysRevB.42.934

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Upper critical field in superconductors and the uncertainty principle: Upper limit to the maximum slope of Hc2

J. Luzuriaga

DOI 10.1103/PhysRevB.42.934 · Physical Review B

T1

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Abstract

Consideration of the formulas that give the upper critical field Hc2 near the critical temperature Tc for superconductors in the dirty limit, together with the uncertainty principle, is shown to provide an upper limit to the maximum slope of Hc2. Analysis of reported values shows that amorphous superconductors are in this limit.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown