Critical field enhancement near a superconductor-insulator transition

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 H(c2) for (TMTSF)2PF6 and a strong upward curvature in the critical field versus temperature in the region of pressure-temperature ph...

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Veröffentlicht in:Physical review letters 2002-05, Vol.88 (20), p.207002-207002, Article 207002
Hauptverfasser: Lee, I J, Chaikin, P M, Naughton, M J
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container_title Physical review letters
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creator Lee, I J
Chaikin, P M
Naughton, M J
description 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 H(c2) 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.
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title Critical field enhancement near a superconductor-insulator transition
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