Charged excitons in fractional quantum Hall regime

Download
  1. Get@NRC: Charged excitons in fractional quantum Hall regime (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1063/1.2730061
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Proceedings titlePhysics of semiconductors : 28th International Conference on the Physics of Semiconductors, ICPS 2006, Vienna, Austria, 24-28 July 2006
Series titleAIP Conference Proceedings; no. 893
Conference28th International Conference on the Physics of Semiconductors, July 24-28, 2006, Vienna, Austria
ISSN0930-8989
ISBN978-0-7354-0398-7
Pages655656; # of pages: 2
AbstractWe report on photoluminescence experiments carried out at very low temperatures and with magnetic fields up to 28T performed on a high mobility two-dimensional electron gas GaAs/AlGaAs quantum well. Our experiments show that clear signatures of the ν =1/3, 2/5, 3/7, 3/5, 2/3, 1 sequence of the FQHE states can also be easily visible even in raw magneto-photoluminescence spectra. Theoretical calculations of excitonic transitions suggest that an explanation of the red shift of emission energy at the Hall plateau boundary may be due to the appearance of additional free charged quasi-particles that bind to an exciton, forming a fractionally charged exciton whose emission energy is expected to be lower, in analogy to well known charged excitons in n-type semiconductors. The magnitude of the shift is a measure of the fractionally charged exciton binding energy. Emission in the insulating state of 2DEG at ν = 1/3 is attributed to a neutral quasi-exciton whose complicated energy dispersion results in an emission doublet with its low energy line due to the recombination from excited excitonic states.
Publication date
PublisherThe American Institute of Physics
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number12346402
Export citationExport as RIS
Report a correctionReport a correction
Record identifieraf50cc2a-d49f-4c9a-87ac-6732e3b85463
Record created2009-09-17
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)