The DX centre
T.N. Morgan
Semiconductor Science and Technology
We report magnetotunneling measurements on strained p- Si Si1-Gex double-barrier resonant tunneling structures in fields up to 30 T. In the I(V,B∥) characteristics of the first heavy-hole peak we observe satellite resonances corresponding to tunneling with Δn = 1 and Δn = 2 changes in Landau index n. The relative intensity of the satellite peaks excludes scattering as a possible mechanism and we attribute the Δn = 1, 2 peaks to elastic tunneling made possible by Landau level mixing. The observed strong Δn = 2 mixing could arise from the large E(k⊥) anisotropy in the Si1-xGex quantum well, which we probe by I(V, B⊥) measurements. From the shif heavy-hole peak with in-plane B⊥ orientation we find that at large k⊥ the in-plane mass varies strongly between the 〈110〉 (heavy) and 〈100〉 (light) crystallographic directions. © 1994.
T.N. Morgan
Semiconductor Science and Technology
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
Thomas H. Baum, Carl E. Larson, et al.
Journal of Organometallic Chemistry
B.A. Hutchins, T.N. Rhodin, et al.
Surface Science