We study the metal-insulator transition in individual self-assembled quantum wires and report optical evidences of metallic liquid condensation at low temperatures. Firstly, we observe that the temperature and power dependence of the single nanowire photoluminescence follow the evolution expected for an electron-hole liquid in one dimension. Secondly, we find novel spectral features that suggest that in this situation the expanding liquid condensate compresses the exciton gas in real space. Finally, we estimate the critical density and critical temperature of the phase transition diagram at nc∼1×105 cm−1 and Tc∼35 K, respectively.
@article{arxiv.0801.4788,
title = {Exciton Gas Compression and Metallic Condensation in a Single Semiconductor Quantum Wire},
author = {Benito Alen and David Fuster and Guillermo Munoz-Matutano and Juan Martinez-Pastor and Yolanda Gonzalez and Luisa Gonzalez},
journal= {arXiv preprint arXiv:0801.4788},
year = {2008}
}