Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-01-30
Phys. Rev. Lett. 101, 067405 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 5 figures
Scientific paper
10.1103/PhysRevLett.101.067405
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 $n_c\sim1\times10^5$ cm$^{-1}$ and $T_c\sim35$ K, respectively.
Alén Benito
Fuster David
Gonzalez Luisa
González Yolanda
Martínez-Pastor Juan
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