Quantum transport in a multi-path graphene Aharonov–Bohm interferometer

Cynthia I. Osuala, Zitao Tang, Stefan Strauf, Eui Hyeok Yang, Chunlei Qu

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate the quantum transport dynamics of electrons in a multi-path Aharonov–Bohm interferometer comprising several parallel graphene nanoribbons. At low magnetic field strengths, the conductance displays a complex oscillatory behavior stemming from the interference of electron wave functions from different paths, reminiscent of the diffraction grating in optics. With increasing magnetic field strength, certain nanoribbons experience transport blockade, leading to conventional Aharonov–Bohm oscillations arising from two-path interference. We also discuss the impact of edge effects and the influence of finite temperature. Our findings offer valuable insights for experimental investigations of quantum transport in multi-path devices and their potential application for interferometry and quantum sensing.

Original languageEnglish
Article number117012
JournalMaterials Science and Engineering: B
Volume299
DOIs
StatePublished - Jan 2024

Keywords

  • Aharonov–Bohm effect
  • Graphene
  • Interferometry

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