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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5217-5220 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 81 |
| Issue number | 23 |
| DOIs | |
| State | Published - 1998 |