Internal transitions of negatively charged magnetoexcitons and many body effects in a two-dimensional electron gas
Internal transitions of quasi-two-dimensional, negatively charged magnetoexcitons ( X-) and their evolution with excess electron density have been studied in GaAs/AlGaAs quantum wells. In the dilute electron limit, due to magnetic translational invariance, the optically detected resonance spectra ar...
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| Veröffentlicht in: | Physical review letters 2002-02, Vol.88 (5), p.056801-056801, Article 056801 |
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| container_title | Physical review letters |
| container_volume | 88 |
| creator | Nickel, H A Yeo, T M Dzyubenko, A B McCombe, B D Petrou, A Sivachenko, A Yu Schaff, W Umansky, V |
| description | Internal transitions of quasi-two-dimensional, negatively charged magnetoexcitons ( X-) and their evolution with excess electron density have been studied in GaAs/AlGaAs quantum wells. In the dilute electron limit, due to magnetic translational invariance, the optically detected resonance spectra are dominated by bound-to-continuum bands in contrast to the negatively charged donor system D-, which exhibits strictly bound-to-bound transitions. With increasing excess electron density Landau-level filling factors nu2. The blueshifted transitions are explained in terms of a new type of collective excitation---magnetoplasmons bound to a mobile valence band hole. |
| doi_str_mv | 10.1103/PhysRevLett.88.056801 |
| format | Article |
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| source | American Physical Society Journals |
| title | Internal transitions of negatively charged magnetoexcitons and many body effects in a two-dimensional electron gas |
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