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Title

Temperature-dependent linewidth of charged excitons in semiconductor quantum dots: Strongly broadened ground state transitions due to acoustic phonon scattering

AuthorsUrbaszek, B.; McGhee, E. J.; Krüger, M.; Warburton, Richard J.; Karrai, Khaled; Amand, T.; Gerardot, B. D.; Petroff, Pierre M.; García Martínez, Jorge Manuel CSIC ORCID CVN
KeywordsExcitons
Semiconductor quantum dots
Issue Date8-Jan-2004
PublisherAmerican Physical Society
CitationPhysical Review B 69, 035304 (2004)
AbstractWe report temperature-dependent photoluminescence on neutral and charged excitons in individual InAs quantum dots. We find narrow emission lines for temperatures up to 30 K for exciton transitions where only the electron ground state is occupied. In contrast, for doubly charged excitons where the excited electron state is occupied, we observe a drastic increase of the ground state transition linewidth even at 30 K. We interpret this as evidence that the excited electron state is degenerate with the low energy tail of continuum states.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.69.035304
URIhttp://hdl.handle.net/10261/24305
DOI10.1103/PhysRevB.69.035304
ISSN1098-0121
Appears in Collections:(IMN-CNM) Artículos

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