ODMR evidence of electronic cascade in multiple asymmetrical (CdMn)Te quantum wells
A. S. Gurin*, D. O. Tolmachev*, N. G. Romanov*, B. R. Namozov*, P. G. Baranov*, Yu. G. Kusrayev*, G. Karczewski×
*Ioffe Institute, 194021 St. Petersburg, Russia
×Institute of Physics, Polish Academy of Sciences, PL-02608 Warsaw, Poland
Abstract
Exchange-coupled complexes consisting of Mn ions and holes were
revealed by optically detected magnetic resonance in the narrowest quantum
wells of asymmetrical multiple-quantum-well structures (CdMn)Te/(CdMg)Te.
Calculations were performed to estimate the parameters of the complexes
(exchange interactions and hole g-factors) and simulate the spectra.
The formation of such complexes implies the directional electron tunneling
from narrow to larger wells, i.e. an electronic cascade, which results in the
creation of the excess hole concentration in the narrowest and
intermediate-width quantum wells.