Superconductor-Insulator Transition in a Parallel Magnetic Field
Wenhao Wu, P. W. Adams
DOI 10.1103/PhysRevLett.73.1412 · Physical Review Letters
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Abstract
We report the use of a parallel magnetic field to suppress the superconducting gap and intergrain Josephson coupling in granular Al films. The critical field Hc∥ is spin paramagnetically limited, and the field induced superconductor-insulator (S-I) transition is found to go from second order to first order at 250 mK. In the vicinity of Hc∥, the field reproduces the quasireentrance and super-resistive behavior seen in the zero-field S-I transition. We show that the super-resistive phase is dominated by Coulomb blockade.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure unresolved | unknown |
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