TY - JOUR AU - First, P AU - Stroscio, Joseph AU - Dragoset, Robert AU - Pierce, Daniel AU - Celotta, Robert C2 - Physical Review Letters DA - 1989-01-01 00:01:00 LA - en M1 - 63 PB - Physical Review Letters PY - 1989 TI - Metallicity and Gap States in Tunneling to Fe Clusters on GaAs(110) ER -