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Selective magneto‐luminescence spectroscopy of donoacceptor pairs in n‐GaAs
Author(s) -
Wysmolek A.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301541
Subject(s) - bohr radius , luminescence , atomic physics , spectroscopy , acceptor , radius , impurity , ground state , hydrogen , hydrogen atom , bohr model , angular momentum , atom (system on chip) , chemistry , physics , condensed matter physics , optoelectronics , exciton , computer security , quantum mechanics , computer science , embedded system , alkyl , organic chemistry
The results of selective magneto‐luminescence measurements of donoacceptor pairs in n‐type GaAs are discussed. The experimental data are compared with the calculated energy levels of a hydrogen‐like atom in a magnetic field, enabling us to identify a large number of high angular momentum states of the hydrogen‐like impurity in magnetic fields. It is shown that in addition to intra‐donor transitions, the spin‐flip excitations of donor–acceptor pairs involving heavy and light holes can be observed, yielding information about g ‐factors for heavy and light holes. For the pairs with separations smaller than the donor Bohr radius, a strong modification of the SPL spectrum is observed. This effect is discussed in terms of modification of the acceptor ground state induced by the interaction with a neighbouring donor centre.