We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Photoluminescence of negatively charged exciton...
View graph of relations


Text available via DOI:

« Back

Photoluminescence of negatively charged excitons in high magnetic fields

Research output: Contribution to journalJournal article


  • M Hayne
  • Christopher L Jones
  • Ria Bogaerts
  • Clara Riva
  • Alan Usher
  • Francois M Peeters
  • Fritz Herlach
  • Victor V Moshchalkov
  • Mohamed Henini
<mark>Journal publication date</mark>15/01/1999
<mark>Journal</mark>Physical Review B
Number of pages5
<mark>Original language</mark>English


We have studied the low-temperature photoluminescence of the two-dimensional electron gas in a single GaAs quantum well in magnetic fields up to 50 T over four orders of magnitude of illumination intensity. At the very highest illumination powers, where the recombination is excitonic at zero field, we find that the binding energy of both the singlet and triplet states of the negatively charged exciton (X-) increase monotonically with the applied field above 15 T. This contradicts recent calculations for X-, but is in agreement with adapted calculations for the binding energy of negative-donor centers. At low-laser powers we observe a strong transfer of luminescence intensity from the singlet (ground) state to the tripler (excited) state as the temperature is reduced below 1 K. This is attributed to the spin polarization of the two-dimensional electron gas by the applied magnetic field. [S0163-1829(99)01104-2].