Thickness–Magnetic Field Phase Diagram at the Superconductor-Insulator Transition in 2D
N. Marković, C. Christiansen, A. M. Goldman
DOI 10.1103/PhysRevLett.81.5217 · Physical Review Letters
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Abstract
The superconductor-insulator transition in ultrathin films of amorphous Bi has been tuned by changing both film thickness and magnetic field on the same set of films. A thickness–magnetic field phase diagram has been mapped in the T=0 limit. A finite size scaling analysis has been carried out to determine the critical exponent product νz, which was found to be 1.2±0.2 and 1.4±0.2 for the thickness-tuned transitions in zero and finite magnetic fields, respectively. These are different from the exponent found for the magnetic-field-tuned transition in the same system, 0.7±0.2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
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