Aharonov-Bohm effect in an electron-hole graphene ring system

2012/04/30 by D. Smirnov, H. Schmidt, R. J. Haug · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Amplitude #Dipole #Electron #Gapless playback #Graphene #Graphene research and applications #Quantum #Quantum and electron transport phenomena #Quantum interference #Ring (chemistry) #cond-mat.mes-hall

paper · pdf · doi:10.1063/1.4717622

4 pages, 3 figures

arxiv created 2012/05/02 · openalex publication_date 2012/05/14 · arxiv updated 2015/06/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Aharonov-Bohm oscillations are observed in a graphene quantum ring with a topgate covering one arm of the ring. As graphene is a gapless semiconductor, this geometry allows to study not only the quantum interference of electrons with electrons or holes with holes, but also the unique situation of quantum interference between electrons and holes. The period and amplitude of the observed Aharonov-Bohm oscillations are independent of the sign of the applied gate voltage showing the equivalence between unipolar and dipolar interferences.

Citations

• Transport Measurements Across a Tunable Potential Barrier in Graphene
• Significance of Electromagnetic Potentials in the Quantum Theory
• Quantized Transport in Graphene p-n Junctions in a Magnetic Field
• Electric Field Effect in Atomically Thin Carbon Films
• Aharonov-Bohm effect and broken valley degeneracy in graphene rings
• Electronic Transport and Quantum Hall Effect in Bipolar Graphenep−n−pJunctions
• Making graphene visible

Cited by

• Transport of Massless Dirac Fermions in Non-topological Type Edge States
• Irregular Aharonov–Bohm effect for interacting electrons in a ZnO quantum ring
• Fano resonances in hexagonal zigzag graphene rings under external magnetic flux