Fano Resonance in Transport Through Double Quantum Dot in Parallel

Yujie Zhang, Mikio Eto

Research output: Contribution to journalArticle

Abstract

The transport properties of double quantum dot (DQD) in parallel are theoretically examined. This system simulates a mesoscopic ring with an embedded quantum dot, so-called Aharonov–Bohm (AB) interferometer, by enlarging the line width in one of the quantum dots. We find that: 1) the Coulomb peak shows an asymmetric shape of Fano resonance when the DQD is coupled to external leads with single conduction channel; 2) the peak becomes more symmetric for the leads with multiple channels; and 3) the resonant shape is characterized by a single parameter which is determined by the structure of the leads. Our theory may explain the experimental results on the transport through the AB interferometer; an asymmetric Fano resonance was observed by one group while a symmetric Breit–Wigner resonance was observed by the other groups.

Original languageEnglish
JournalPhysica Status Solidi (B) Basic Research
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Aharonov–Bohm effect
  • Fano resonance
  • interference
  • mesoscopic systems
  • quantum dots

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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