Observation of the superconducting energy gap in a semiconductor (GeTe)

E. Mendez, L.L. Chang, et al.

Surface Science

T.P. Smith III, H. Munekata, et al.

Surface Science

S. Washburn, R.A. Webb, et al.

Physical Review B

L. Esaki, P.J. Stiles, et al.

Physical Review Letters