R.T. Zeller, B.B. Goldberg, et al.
Physical Review B
No abstract available.
R.T. Zeller, B.B. Goldberg, et al.
Physical Review B
E. Mendez, L.L. Chang, et al.
Physical Review Letters
L.L. Chang, H. Sakaki, et al.
Physical Review Letters
R. Tsu, L. Esaki
Applied Physics Letters