Reduction of the superconducting gap of ultrathin Pb islands grown on Si(111)

1. Brun, C.
2. Hong, I.-P.
3. Patthey, F.
4. Sklyadneva, I.Y.
5. Heid, R.
6. Echenique, P.M.
7. Bohnen, K.P.
8. Chulkov, E.V.
9. Schneider, W.-D.