Classical-quantum crossovers in quasi-one-dimensional electron-hole systems: Exciton-Mott physics and interband optical spectra

Takuya Yoshioka, Kenichi Asano

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We study quasi-one-dimensional electron-hole (e-h) systems by applying a self-consistent screened T-matrix approximation (SSTA), which can treat an e-h pair embedded in the background of the exciton-plasma mixture, characterized by the exciton ionization ratio. Two classical-quantum crossovers are found. The first crossover takes place as the drastic suppression of ionization ratio, representing the onset of the quantum dissociation of the exciton (binding-energy reduction and level-broadening effects). The second one can be seen in a gradual change in the interband absorption-gain and photoluminescence spectra: Moss-Burstein effects become significant, and the e-h plasma starts to dominate the optical gain. Most of the features of the absorption-gain spectra observed in the recent experiments can be captured semiquantitatively by our SSTA.

本文言語English
論文番号115314
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
86
11
DOI
出版ステータスPublished - 2012 9 10
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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