Breakdown of phase rigidity and variations of the Fano effect in closed Aharonov-Bohm interferometers

Amnon Aharony, Ora Entin-Wohlman, Tomohiro Otsuka, Shingo Katsumoto, Hisashi Aikawa, Kensuke Kobayashi

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Although the conductance of a closed Aharonov-Bohm interferometer, with a quantum dot on one branch, obeys the Onsager symmetry under magnetic field reversal, it needs not be a periodic function of this field: The conductance maxima move with both the field and the gate voltage on the dot, in an apparent breakdown of "phase rigidity." These experimental findings are explained theoretically as resulting from multiple electronic paths around the interferometer ring. Data containing several Coulomb blockade peaks, whose shapes change with the magnetic flux, are fitted to a simple model, in which each resonant level on the dot couples to a different path around the ring.

本文言語English
論文番号195329
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
73
19
DOI
出版ステータスPublished - 2006
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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