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

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number073306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number7
DOIs
Publication statusPublished - 2010 Aug 17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Excitonic Aharonov-Bohm effect in isotopically pure <sup>70</sup>Ge/Si self-assembled type-II quantum dots'. Together they form a unique fingerprint.

  • Cite this