Critical Field Enhancement near a Superconductor-Insulator Transition

I. J. Lee; P. M. Chaikin; M. J. Naughton

doi:10.1103/PhysRevLett.88.207002

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Critical Field Enhancement near a Superconductor-Insulator Transition

I. J. Lee, P. M. Chaikin, M. J. Naughton

DOI 10.1103/PhysRevLett.88.207002 · Physical Review Letters

T1

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Abstract

We have discovered a phenomenon where the orbital pair breaking effect is reduced, if not eliminated. It appears as a striking enhancement in the upper critical field Hc2 for (TMTSF)2PF6 and a strong upward curvature in the critical field versus temperature in the region of pressure-temperature phase space near the superconductor-spin density wave insulator boundary. A simple model based on self-consistently dividing the superconductor into layers explains the observations remarkably well and provides a unique way around orbital frustration and toward higher critical fields.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.2	0.68 GPa	onset
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.2	0.57 GPa	onset