arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.4788cond-mat.str-elcond-mat.mes-hall
收藏

半导体量子线中激子气体压缩和金属凝聚

Exciton Gas Compression and Metallic Condensation in a Single Semiconductor Quantum Wire

Benito Alen, David Fuster, Guillermo Munoz-Matutano, Juan Martinez-Pastor, Yolanda Gonzalez, Luisa Gonzalez

摘要:

我们研究了单个自组装量子线中的金属-绝缘体转变,并报道了低温下金属液体凝聚的光学证据。首先,我们观察到单根纳米线光致发光的温度和功率依赖性遵循一维电子空穴液体的预期演化。其次,我们发现了新的光谱特征,表明在这种情况下,膨胀的液体冷凝物压缩激子气体在真实空间中。最后,我们估计的临界密度和临界温度的相变图在$n_c\sim1\times10^5$ cm $^{-1}$和$T_c\sim35$ K,分别。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑