S. Washburn, R.A. Webb, et al.
Physical Review B
No abstract available.
S. Washburn, R.A. Webb, et al.
Physical Review B
L. Esaki, L.L. Chang
Proceedings of the IEEE
G.H. Döhler, R. Tsu, et al.
Solid State Communications
L. Esaki, P.J. Stiles
Physical Review Letters