Transmission through a mesoscopic ring with a quantum dot

Jian Wu, Bing Lin Gu, Junjie Liu, Youjiang Guo, Jia Lin Zhu, Jing Zhi Yu, Yoshiyuki Kawazoe

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The transmission through a mesoscopic ring with a quantum dot embedded in one of its arms is studied with a one-dimensional scattering model. The quantum dot is approached by a quantum well scatterer. With the use of a scattering matrix describing the junctions between the leads and the ring, it is analytically shown that the quantum interference and the resonant tunneling dominate the transmission. When the state of the dot is far from a resonance, the system acts as a quantum wire with two separated stubs at both ends. However, when a resonant tunneling through the dot occurs, an extra phase shift may be introduced to the wave through the dot and then the quantum interference effect may be flipped. The dependence of the total transmission coefficient on the properties of the quantum dot is also presented.

本文言語English
ページ(範囲)245-250
ページ数6
ジャーナルPhysics Letters, Section A: General, Atomic and Solid State Physics
262
2-3
DOI
出版ステータスPublished - 1999 11月 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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