Transmission through a quantum dot with two orbitals

Wataru Izumida, Hiroshi Akera

研究成果: Article査読

抄録

Transmission coefficient through a quantum dot, which contains two Orbitals, is calculated in the weak-tunneling regime, taking into account the Coulomb interaction within the dot. Transmitted waves through these orbitals acquire phase shifts which differ by π from each other in the present model. The transmission coefficient as a function of gate voltage exhibits symmetric and asymmetric line shapes, depending on temperature T. A nearly symmetric line shape appears in the temperature region of 0.05 ≲ kBT/δ ≲ 0.25, where δ is the single-particle energy level separation in the dot. This behavior is understood by a combined action of the above-mentioned phase difference and the Coulomb interaction. A possibility that this mechanism explains the recent experiment is suggested.

本文言語English
ページ(範囲)1963-1965
ページ数3
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
40
3 B
DOI
出版ステータスPublished - 2001
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(その他)
  • 物理学および天文学(全般)

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