Quantum Hall nano-interferometer in graphene

N. Moreau; B. Brun; S. Somanchi; K. Watanabe; T. Taniguchi; C. Stampfer; B. Hackens

Quantum Hall nano-interferometer in graphene

Mesoscale and Nanoscale Physics 2021-10-18 v1

Authors: N. Moreau , B. Brun , S. Somanchi , K. Watanabe , T. Taniguchi , C. Stampfer , B. Hackens

Abstract

Quantum Hall edge states offer avenues for quasiparticle interferometry, provided that the ratio between phase coherence length and quantum Hall interferometer (QHI) size is large enough. Maximizing this ratio by shrinking the QHI area favors Coulomb interactions, impairing clear interferences observation. Here, we use scanning gate spectroscopy to probe interference regime in antidots-based graphene nano-QHIs, free of localized states (LS). A simple Fabry-Perot model, without Coulomb interaction, reproduces the QHI phenomenology, even in the smallest QHI, highlighting the LS detrimental role.

Keywords

fractional quantum hall effect quantum hall effect quantum hall effect in graphene

Cite

@article{arxiv.2110.07979,
  title  = {Quantum Hall nano-interferometer in graphene},
  author = {N. Moreau and B. Brun and S. Somanchi and K. Watanabe and T. Taniguchi and C. Stampfer and B. Hackens},
  journal= {arXiv preprint arXiv:2110.07979},
  year   = {2021}
}

Comments

5 pages, 4 figures

Quantum Hall nano-interferometer in graphene

Abstract

Keywords

Cite

Comments

Related papers