S. Washburn, R.A. Webb, et al.
Physical Review B
No abstract available.
S. Washburn, R.A. Webb, et al.
Physical Review B
R. Tsu, L. Esaki
Physical Review Letters
L. Esaki, L.L. Chang
Proceedings of the IEEE
C.Y. Fong, J.S. Nelson, et al.
Physical Review B