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Open Quantum Systems Decoherence

Persistent currents in absence of magnetic field in graphene nanorings: The ambiguous role of inter valley scattering

arXiv
Authors: Colin Benjamin, A M Jayannavar

Year

2013

Paper ID

32614

Status

Preprint

Abstract Read

~2 min

Abstract Words

100

Citations

0

Abstract

Persistent currents can arise in normal-metal rings due to a magnetic flux threading the ring in equilibrium. However, can persistent currents arise in absence of magnetic flux in the same normal-metal rings? Yes they can but in a non-equilibrium set-up. This is known as current magnification. In this work we show that current magnification can be seen in graphene nanorings. Further, graphene can have electrons polarized with a valley quantum number. Electron scattering between valleys can have a non-trivial effect on these persistent currents including inducing a sign change and generating them for parameters where none existed to begin with.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2013 reference point for readers tracking recent quantum research.
  • Persistent currents can arise in normal-metal rings due to a magnetic flux threading the ring in equilibrium.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1309.5197 [2] arXiv https://arxiv.org/abs/1309.5197 [3] Publisher https://arxiv.org/abs/1309.5197

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal • updated 2026-06-09 21:27:01

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