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Observation of large many-body Coulomb interaction effects in a doped quantum wire

Hidefumi Akiyama·Loren N. Pfeiffer·Aron Pinczuk·Ken W. West·Masahiro Yoshita
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Abstract

We demonstrate strong one dimensional (1-D) many-body interaction effects in photoluminescence (PL) in a GaAs single quantum wire of unprecedented optical quality, where 1-D electron plasma densities are controlled via electrical gating. We observed PL of 1-D charged excitons with large binding energy of 2.3 meV relative to the neutral excitons, and its evolution to a Fermi-edge singularity at high electron density. Furthermore, we find a strong band-gap renormalization in the 1-D wire, or a large red-shift of PL with increased electron plasma density. Such a large PL red-shift is not observed when we create a high density neutral electron-hole plasma in the same wire, due probably to cancellation of the Coulomb interaction energy in the neutral plasma.

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Hidefumi Akiyama, Loren N. Pfeiffer, Aron Pinczuk, Ken W. West, Masahiro Yoshita. 2002-04-14. Observation of large many-body Coulomb interaction effects in a doped quantum wire. https://doi.org/10.1016/s0038-1098(02)00093-5

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