Local Nature of Artificial Homojunction Band Discontinuities
The feasibility of creating homojunction band discontinuities by dipole intralayers was recently demonstrated with photoemission studies. We explored the nature of this intriguing mechanism by studying the effects of several complex intralayers, specifically stacked sequences of dipole intralayers. Quite unexpectedly, we found that the magnitude of the corresponding discontinuities is comparable to those created by individual dipole intralayers. We discuss this result in light of the recently observed [L. Sorba, G. Bratina, G. Ceccone, A. Antonini, J. F. Walker, M. Micovic, and A. Franciosi, Phys. Rev. B 43, 2450 (1991)], similarly unpredicted saturation at low thickness of intralayer-induced heterojunction band discontinuities modifications.
Cnr,ist struttura mat,i-00044 frascati,italy. ecole polytech fed lausanne,inst phys appl,ch-1015 lausanne,switzerland. Marsi, m, univ wisconsin,dept phys,madison,wi 53706.
ISI Document Delivery No.: JJ226
Record created on 2006-10-03, modified on 2016-08-08