V. S. Bagaev, V. S. Krivobok, S. N. Nikolaev, E. E. Onishchenko, M. L. Skorikov, A. V. Novikov, D. N. Lobanov, “Condensation of excitons and the spectrum of multiparticle states in SiGe/Si quantum wells: The role of the barrier in the conduction band”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 94, Issue 1,Pages <nobr>63

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CONDENSED MATTER

Condensation of excitons and the spectrum of multiparticle states in SiGe/Si quantum wells: The role of the barrier in the conduction band

V. S. Bagaev^a, V. S. Krivobok^a, S. N. Nikolaev^a, E. E. Onishchenko^a, M. L. Skorikov^a, A. V. Novikov^b, D. N. Lobanov^b

^a P. N. Lebedev Physical Institute, Russian Academy of Sciences
^b Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod

Abstract: It has been demonstrated that the barrier in the conduction band represented by the SiGe layer in SiGe/Si quantum wells affects the work function and equilibrium density of the quasi-two-dimensional condensed phase formed in these structures. The existence of a new recombination channel with unconventional characteristics is uncovered in the structures with barrier heights close to the critical value for the formation of the electron-hole liquid.

Received: 11.05.2011