Posted in | News | Quantum Physics

Particle Physics Theory Describes Behaviour of Excitons in Two Layers of Graphene

Belgian scientists have used a particle physics theory to describe the behaviour of particle-like entities, referred to as excitons, in two layers of graphene, a one-carbon-atom-thick honeycomb crystal. In a paper published in EPJ B, Michael Sarrazin from the University of Namur, and Fabrice Petit from the Belgian Ceramic Research Centre in Mons, studied the behaviour of excitons in a bilayer of graphene through an analogy with excitons evolving in two abstract parallel worlds, described with equations typically used in high-energy particle physics.

The authors used the equations reflecting a theoretical world consisting of a bi-dimensional space sheet - a so-called brane - embedded in a space with three dimensions. Specifically, the authors described the quantum behaviour of excitons in a universe made of two such brane worlds. They then made an analogy with a bilayer of graphene sheets, in which quantum particles live in a separate space-time.

They showed that this approach is adapted to study theoretically and experimentally how excitons behave when they are confined within the plane of the graphene sheet.

Sarrazin and his colleague have also theoretically shown the existence of a swapping effect of excitons between graphene layers under specific electromagnetic conditions. This swapping effect may occur as a solid-state equivalent of known particle swapping predicted in brane theory.

To verify their predictions, the authors suggest the design for an experimental device relying on a magnetically tunable optical filter. It uses magnets whose magnetic fields can be controlled with a separate external magnetic field. The excitons are first produced by shining an incident light onto the first graphene layer. The device then works by recording photons in front of the second graphene layer, which provide a clue to the decay of the exciton after it has swapped onto the second layer from the first.

Source: http://www.springer.com/

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Springer - Science and Technology Publishers. (2019, February 18). Particle Physics Theory Describes Behaviour of Excitons in Two Layers of Graphene. AZoQuantum. Retrieved on February 24, 2024 from https://www.azoquantum.com/News.aspx?newsID=1556.

  • MLA

    Springer - Science and Technology Publishers. "Particle Physics Theory Describes Behaviour of Excitons in Two Layers of Graphene". AZoQuantum. 24 February 2024. <https://www.azoquantum.com/News.aspx?newsID=1556>.

  • Chicago

    Springer - Science and Technology Publishers. "Particle Physics Theory Describes Behaviour of Excitons in Two Layers of Graphene". AZoQuantum. https://www.azoquantum.com/News.aspx?newsID=1556. (accessed February 24, 2024).

  • Harvard

    Springer - Science and Technology Publishers. 2019. Particle Physics Theory Describes Behaviour of Excitons in Two Layers of Graphene. AZoQuantum, viewed 24 February 2024, https://www.azoquantum.com/News.aspx?newsID=1556.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type
Submit
Azthena logo

AZoM.com powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Azthena logo with the word Azthena

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from AZoNetwork.com.

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.