Strong Fermi-edge singularity in ultra-high-quality AlGaAs/GaAs quantum wires |
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| Authors: | X-L Wang M Ogura T Guillet V Voliotis R Grousson |
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| Institution: | aNanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, Tsukuba 305-8568, Japan;bInstitut des Nanosciences de Paris, CNRS, UMR 7588, Universités Pierre et Marie Curie et Denis Diderot, Campus Boucicaut, 140 Rue de Lourmel, 75015 Paris, France |
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| Abstract: | We report the observation of a strong Fermi-edge singularity (FES), with the complete suppression of the band-edge peak, in the photoluminescence spectra of ultra-high-quality modulation-doped AlGaAs/GaAs quantum wires (QWRs). We find that the FES effect is very sensitive to the Fermi energy. The strong FES is observed only in QWRs having a Fermi energy of the order of a few meV, and disappears almost completely when the Fermi energy exceeds 10 meV. These results are expected to spark new research activities, both experimentally and theoretically, on many-body effects in one-dimensional electron gas. |
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| Keywords: | Fermi-edge singularity Quantum wires Photoluminescence |
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