Fano effect in the transport of an artificial molecule

Shota Norimoto, Shuji Nakamura, Yuma Okazaki, Tomonori Arakawa, Kenichi Asano, Koji Onomitsu, Kensuke Kobayashi, and Nobu-hisa Kaneko
Phys. Rev. B 97, 195313 – Published 25 May 2018

Abstract

The Fano effect is a ubiquitous phenomenon arising from interference between a discrete energy state and an energy continuum. We explore this effect in an artificial molecule, namely, two lateral quantum dots (QDs) fabricated from a two-dimensional electron gas system and coupled in series. When the coupling between the leads and QDs is small, the charge stability diagram of the system shows a honeycomb lattice structure that is characteristic of a double QD system. As the coupling increases, a honeycomb structure consisting of the Fano resonances emerges. A numerical simulation based on the T-matrix method can satisfactorily reproduce our experimental observation. This report constitutes a clear example of the ubiquitous nature of the Fano effect in mesoscopic transport.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 9 January 2018
  • Revised 6 April 2018

DOI:https://doi.org/10.1103/PhysRevB.97.195313

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Shota Norimoto1, Shuji Nakamura2, Yuma Okazaki2, Tomonori Arakawa1,4, Kenichi Asano1, Koji Onomitsu3, Kensuke Kobayashi1,4, and Nobu-hisa Kaneko2

  • 1Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • 2National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8563, Japan
  • 3NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • 4Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 97, Iss. 19 — 15 May 2018

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×