Science 2 min read

Scientists Discover new Properties of Graphene Materials

Graphene, one of the most promising materials in modern technology, may now be more open to scalability than previously thought. | Image By koya979 | Shutterstock

Graphene, one of the most promising materials in modern technology, may now be more open to scalability than previously thought. | Image By koya979 | Shutterstock

By shedding light on electron interactions in Dirac materials, like graphene, a new discovery solves a long-standing mystery and could contribute to the development of faster electronics.

Although electrons are the basis of modern electronics and are equally crucial to the development of quantum materials and quantum computing, scientists still don’t know much about electron-electron interactions.

Two theories describe electron interactions, the Fermi liquid theory, and Coulomb’s law, with the latter imposing a sort of limit on the former.

At low temperatures, a Fermi liquid is a quantum state of matter where electrons start flowing like a liquid, allowing a material to conduct electricity.

Coulomb’s law, on the other hand, calculates the forces by which two electrically charged particles attract or repel each other, and suggest the existence of a threshold beyond which electrons stand still and the conductivity flow is broken.

Read More: Scientists Now Able to Measure Electrons on the Attosecond Scale

However, this phenomenon has never been scientifically experimented in Dirac materials, a class of 2D materials that include superconductors, topological insulators, and graphene.

After remaining a subject of mathematical debate for over six decades, theoretical physicists at Yale-NUS College in Singapore are providing new clues about electron-electron interactions.

The Yale-NUS team, led by Associate Professor Shaffique Adam, proposes a model to describe electron interaction in Dirac materials, beyond the Coulomb threshold.

Researchers developed a method that allows them to study “the evolution of physical observables in a controllable manner and used it to address the competing effects of short-range and long-range parts in models of the Coulomb interaction. The researchers discovered that the velocity of electrons (the “flow” speed) in a material could decrease if the short-range interaction that favoured the insulating, “frozen” state dominated. However, the velocity of electrons could be enhanced by the long-range component that favoured the conducting, “liquid” state.”

This new computer model can serve as a tool for scientists to predict long-range electron-electron interactions in Dirac materials and see how electrons switch from the conductive to insulating phase, “paving the way for developing advanced electronics such as faster processors.”

The paper, “The role of electron-electron interactions in two-dimensional Dirac fermions”, is published in Science.

Do you think this will finally bring graphene to the full potential we’ve all been waiting on?

First AI Web Content Optimization Platform Just for Writers

Found this article interesting?

Let Zayan Guedim know how much you appreciate this article by clicking the heart icon and by sharing this article on social media.

Profile Image

Zayan Guedim

Trilingual poet, investigative journalist, and novelist. Zed loves tackling the big existential questions and all-things quantum.

Comments (0)
Most Recent most recent
share Scroll to top

Link Copied Successfully

Sign in

Sign in to access your personalized homepage, follow authors and topics you love, and clap for stories that matter to you.

Sign in with Google Sign in with Facebook

By using our site you agree to our privacy policy.