G. Finkelstein et al., MECHANISM OF SHAKEUP PROCESSES IN THE PHOTOLUMINESCENCE OF A 2-DIMENSIONAL ELECTRON-GAS AT HIGH MAGNETIC-FIELDS, Physical review. B, Condensed matter, 56(16), 1997, pp. 10326-10331
We observe shakeup processes in the photoluminescence spectra of a two
-dimensional electron gas in a GaAs/AlxGa1-xAs quantum well at high ma
gnetic fields. We find that when the electrons occupy only the lowest
Landau level these processes are strongly suppressed. We show that thi
s behavior can be accounted for by first-principles calculations. We u
se the same considerations to explain the giant intensity of the shake
up line, which appears just below the main luminescence line.