Flux-free conductance modulation in a helical Aharonov–Bohm interferometer

2010/02/28 by Hisao Taira, Hiroyuki Shima
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Aharonov–Bohm effect #Conductance #Interferometry #Magnetic flux #Molecular Junctions and Nanostructures #Oscillation (cell signaling) #Quantum #Quantum and electron transport phenomena #Quantum wire #Wave function #cond-mat.mes-hall

paper · pdf · doi:10.1088/0953-8984/22/24/245302

10 pages, 4 figures

arxiv created 2010/05/05 · openalex publication_date 2010/06/01 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

A novel conductance oscillation in a twisted quantum ring composed of a helical atomic configuration is theoretically predicted. The internal torsion of the ring is found to cause a quantum phase shift in the wavefunction that describes the electron's motion along the ring. The resulting conductance oscillation is free from magnetic flux penetrating inside the ring, which is in complete contrast with the case for the ordinary Aharonov-Bohm effect observed in untwisted quantum rings.

Citations

• Quantum gates with topological phases
• Exciton Storage in a Nanoscale Aharonov-Bohm Ring with Electric Field Tuning
• Quantum mechanics with constraints
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