Excitonic Aharonov-Bohm effect in isotopically pure 70Ge/Si self-assembled type-II quantum dots

Satoru Miyamoto, Oussama Moutanabbir, Toyofumi Ishikawa, Mikio Eto, Eugene E. Haller, Kentarou Sawano, Yasuhiro Shiraki, Kohei M. Itoh

研究成果: Article査読

22 被引用数 (Scopus)

抄録

We report on a magnetophotoluminescence study of isotopically pure 70Ge/Si self-assembled type-II quantum dots. Oscillatory behaviors attributed to the Aharonov-Bohm effect are simultaneously observed for the emission energy and intensity of excitons subject to an increasing magnetic field. When the magnetic flux penetrates through the ringlike trajectory of an electron moving around each quantum dot, the ground state of an exciton experiences a change in its angular momentum. Our results provide the experimental evidence for the phase coherence of localized electron wave functions in group-IV Ge/Si self-assembled quantum structures.

本文言語English
論文番号073306
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
82
7
DOI
出版ステータスPublished - 2010 8月 17

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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