(Press-News.org) Contact information: Franziska Hornig
franziska.hornig@springer.com
49-622-148-78414
Springer
Quasi-particle swap between graphene layers
Equations used to describe parallel worlds in particle physics can help study the behaviour of particles in parallel graphene layers
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.
###
Reference: M. Sarrazin and F. Petit (2013), Exciton swapping in a twisted graphene bilayer as a solid-state realization of a two-brane model, European Physical Journal B, DOI 10.1140/epjb/e2013-40492-5
For more information visit: http://www.epj.org
The full-text article is available to journalists on request.
Quasi-particle swap between graphene layers
Equations used to describe parallel worlds in particle physics can help study the behaviour of particles in parallel graphene layers
2014-02-03
ELSE PRESS RELEASES FROM THIS DATE:
Biologic agents provide relief for children newly diagnosed with Crohn's disease
2014-02-03
Bethesda, MD (Feb. 3, 2014) — Children newly diagnosed with Crohn's disease may benefit from early treatment with the biologic drugs known as anti-TNF-α agents, ...
Invisible risk group among adolescents at risk of mental ill-health
2014-02-03
Adolescents with high media use, reduced sleep and low physical activity comprise an 'invisible-risk' group that has high prevalence of psychiatric symptoms, according to a large international study ...
Researchers develop 'envy-free' algorithm for settling disputes
2014-02-03
Whether it's season tickets to Green Bay Packers' games or silver place settings, divorce and inheritance have bred protracted disputes over the assignment of belongings. But, now, a trio of researchers ...
UC researchers at ground control in launching the fastest plane of the future
2014-02-03
It's a sci-fi concept that's at the center of a 25-year exploratory project: building a hypersonic aircraft that takes off from the runway and doesn't need a rest, inspection or repair ...
Adolescents' salt intake correlates with obesity, inflammation
2014-02-03
Augusta, Ga. – Most adolescents consume as much salt as adults – some more than twice the recommended daily allowance – and that high sodium intake correlates with fatness ...
Women with schizophrenia at higher risk of pregnancy and delivery complications: Study
2014-02-03
TORONTO, February 3, 2014 – Women with schizophrenia are nearly twice as likely to experience pre-eclampsia, pre-term birth and other serious pregnancy and delivery ...
Dramatic thinning of Arctic lake ice cuts winter ice season by 24 days
2014-02-03
Arctic lakes have been freezing up later in the year and thawing earlier, creating a winter ice season about 24 days shorter than it was in 1950, a University of Waterloo study has found.
The ...
IUPUI study first to find earlier depression treatment prevents heart attacks and strokes
2014-02-03
INDIANAPOLIS – Research led by Jesse C. Stewart, Ph.D., of the School of Science at Indiana University-Purdue University Indianapolis, ...
New scientific field looks at the big picture
2014-02-03
EAST LANSING, Mich. -- Big data is changing the field of ecology. The shift is dramatic enough to warrant the creation of an entirely new field: macrosystems ecology.
"Ecologists can no longer sample and ...
Five black chemists who changed the world (video)
2014-02-03
WASHINGTON, Feb. 3, 2014 — They've alleviated pain, saved crops and blasted into space, to name just a few of their long list of accomplishments. The American Chemical Society's Reactions YouTube series (formerly ...
LAST 30 PRESS RELEASES:
What makes successful learners? How Minecraft can helps us understand social learning
Researchers create ‘super stem cells’, seeing potential for improved fertility treatment
Empathic comforting varies more within bonobo and chimpanzee species than between them
AACR 2025: Colon cancer risk reduction, predicting melanoma spread and new drug therapies among Ohio State findings
Landmark 20-year screening program drives down colorectal cancer cases, deaths
Can a baby’s DNA predict future disease? This study says it might
Gene mutations linked to worse outcomes in stomach cancer
Blood proteins can predict liver disease up to 16 years before symptoms
Study: New DNA-reading technology holds promise for rare disease research
Study: Antibiotic exposure before age two linked to childhood obesity
Study: Artificial intelligence more accurately identifies child abuse
Study: Opioid use disorder treatment improves pregnancy outcomes
Study: Education improves in-home gun safety
Study: Treatment ineffective for newborns with low oxygen or blood supply
Study: Children with chronic conditions at risk for severe RSV outcomes
Study: Telehealth in pediatric primary care supports judicious antibiotic prescribing
Animal energy usage made visible through video
Precision agriculture advances: novel spectral model improves soybean detection
Metformin for knee osteoarthritis in patients with overweight or obesity
Repurposed diabetes drug can reduce pain for those with knee arthritis and overweight or obesity: study
Global South cities hold key to unlocking healthcare solutions – studies show
Autism not linked with increased age-related cognitive decline
Study shows 90% metal pollution drop in Adirondack waters five decades after the clean air act
Can technology revolutionize health science? The promise of exposomics
Human pressure most affecting Atlantic Rainforest deer density, study finds
The effects of smoking, drinking and lack of exercise are felt by the age of 36, new research indicates
Nanophotonic platform boosts efficiency of nonlinear-optical quantum teleportation
Scientists urge plastic limit for lateral flow tests
Prepare today to save lives tomorrow: SFU study finds gaps in B.C. extreme heat response plans
National Foundation for Cancer Research congratulates Dr. Rakesh Jain on AACR Lifetime Achievement Award
[Press-News.org] Quasi-particle swap between graphene layersEquations used to describe parallel worlds in particle physics can help study the behaviour of particles in parallel graphene layers