Energy relaxation mechanism of hot-electron ensembles in GaAs: Theoretical and experimental study of its temperature dependence

Jelena Sjakste, Nathalie Vast, Giuliana Barbarino, Matteo Calandra, Francesco Mauri, Junichi Kanasaki, Hiroshi Tanimura, Katsumi Tanimura

研究成果: Article査読

15 被引用数 (Scopus)

抄録

We have recently demonstrated that the fast momentum relaxation due to electron-phonon scattering of hot electrons excited into the conduction band of GaAs leads to the formation of hot-electron ensembles spread over the Brillouin zone. In the present work, we study the energy relaxation of hot-electron ensembles in GaAs, by means of ab initio calculations and time-, energy-, and momentum-resolved spectroscopy. We theoretically show that when the temperature decreases, the energy relaxation time ascribed to electron-phonon interaction becomes faster than at ambient temperature and prove that this is indeed the case in the experimental results.

本文言語English
論文番号064302
ジャーナルPhysical Review B
97
6
DOI
出版ステータスPublished - 2018 2月 6
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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