As scientists continue to hunt for a material that will make it possible to pack more transistors on a chip, new research from McGill University and Université de Montréal adds to evidence that black phosphorus could emerge as a strong candidate.
In a study published today in Nature Communications, the researchers report that when electrons move in a phosphorus transistor, they do so only in two dimensions. The finding suggests that black phosphorus could help engineers surmount one of the big challenges for future electronics: designing energy-efficient transistors.
“Transistors work more efficiently when they are thin, with electrons moving in only two dimensions,” says Thomas Szkopek, an associate professor in McGill’s Department of Electrical and Computer Engineering and senior author of the new study. “Nothing gets thinner than a single layer of atoms.”
In 2004, physicists at the University of Manchester in the U.K. first isolated and explored the remarkable properties of graphene — a one-atom-thick layer of carbon. Since then scientists have rushed to investigate a range of other two-dimensional materials. One of those is black phosphorus, a form of phosphorus that is similar to graphite and can be separated easily into single atomic layers, known as phosphorene.
Phosphorene has sparked growing interest because it overcomes many of the challenges of using graphene in electronics. Unlike graphene, which acts like a metal, black phosphorus is a natural semiconductor: it can be readily switched on and off.
“To lower the operating voltage of transistors, and thereby reduce the heat they generate, we have to get closer and closer to designing the transistor at the atomic level,” Szkopek says. “The toolbox of the future for transistor designers will require a variety of atomic-layered materials: an ideal semiconductor, an ideal metal, and an ideal dielectric. All three components must be optimized for a well-designed transistor. Black phosphorus fills the semiconducting-material role.”
The work resulted from a multidisciplinary collaboration among Szkopek’s nanoelectronics research group, the nanoscience lab of McGill Physics Prof. Guillaume Gervais, and the nanostructures research group of Prof. Richard Martel in Université de Montréal’s Department of Chemistry.
To examine how the electrons move in a phosphorus transistor, the researchers observed them under the influence of a magnetic field in experiments performed at the National High Magnetic Field Laboratory in Tallahassee, FL, the largest and highest-powered magnet laboratory in the world. This research “provides important insights into the fundamental physics that dictate the behavior of black phosphorus,” says Tim Murphy, DC Field Facility Director at the Florida facility.
“What’s surprising in these results is that the electrons are able to be pulled into a sheet of charge which is two-dimensional, even though they occupy a volume that is several atomic layers in thickness,” Szkopek says. That finding is significant because it could potentially facilitate manufacturing the material — though at this point “no one knows how to manufacture this material on a large scale.”
“There is a great emerging interest around the world in black phosphorus,” Szkopek says. “We are still a long way from seeing atomic layer transistors in a commercial product, but we have now moved one step closer.”
Read more: Could black phosphorus be the next silicon?
The Latest on: Black Phosphorus
via Google News
The Latest on: Black Phosphorus
- Stirling water monitoring experts support Black Sea regenerationon July 7, 2021 at 3:54 am
Experts from the University of Stirling will use satellite and sensor technology to support the regeneration of the Black Sea, as part of a new £7.7 million (€9m) research project. Funded by the ...
- Another mild algae bloom forecast for Lake Erie this summeron June 30, 2021 at 1:21 pm
The toxic blob of algae that turns western Lake Erie a ghastly shade of green each summer and threatens drinking water and fish should be on the smaller side again this year ...
- Urea fertilizer scarcity hits Tea estates, planters for early solution in Assamon June 30, 2021 at 12:46 am
GUWAHATI: The shortage of urea fertilizer has hit the tea industry hard in Assam. It has turned to be a perennial one due to the alleged lack of monitoring & vigilance by the Agriculture Department ...
- Explained: Impact of Turkey sea snot on global climate and marine lifeon June 26, 2021 at 8:20 am
Turkey has been facing an unusual yet serious issue — sea snot. A layer of thick and slimy mucus covered the surface of the Turkish Marmara Sea, reducing oxygen levels, killing fish, and disrupting ...
- Black Phosphorus Ink Compatible with Inkjet Printers Developedon June 22, 2021 at 5:00 pm
Black phosphorus (BP), a physical of phosphorus, is a two-dimensional material similar to graphene. Its semiconducting bandgap spans a wide region of the electromagnetic spectrum making it more ...
- Does Vitamin D Offer Protection Against COVID-19?on June 17, 2021 at 6:32 am
1 The primary biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus. 1,2 Vitamin D is added ... the risk of having positive results in Black individuals was ...
- ‘Fertilizer Saga’ in Sri Lanka: A Considered Opinionon June 9, 2021 at 5:02 pm
nitrogen, phosphorus and potassium are supplied as inorganic fertilisers ... soybean, mung bean, cowpea, black gram, common bean, etc.) could be an exception because of their ability to utilise ...
- 17 Most Weight-Loss Friendly Foods on the Planeton May 29, 2021 at 5:29 am
Cauliflower is very low in calories at 25 calories per 1 cup serving, yet high in many vitamins and minerals, including vitamin C, vitamin K, folate, potassium, magnesium and phosphorus ... that these ...
- Have a sweet tooth? Then, bookmark this simple ginger and jaggery candy recipeon May 22, 2021 at 2:26 am
Jaggery on the other hand improves immunity and cleanses the body as it is packed with calcium, magnesium, iron, potassium and phosphorus ... clove powder 1/2 tsp black salt 1/2 tsp black pepper ...
- 2020 Commencement Programon May 11, 2021 at 3:01 pm
and Intergenerational Learning with Three Generations of Black Women Dylan T. Cliche Doctor of Philosophy Physics Three-dimensional Ray Tracing and Advanced Applications of Multi-monochromatic X-ray ...
via Bing News