Electron tunneling measurement of a small energy gap in lanthanum

G.K. Shenoy, B.D. Dunlap, et al.

Journal of Applied Physics

A.M. Toxen, M.J. Burns, et al.

Physical Review

L.B. Welsh, A.M. Toxen, et al.

Physical Review B

S. Von Molnar, W.A. Thompson, et al.

Applied Physics Letters