Scientists at the London Centre for Nanotechnology and Department of Physics & Astronomy at UCL have discovered a potential way to make graphene – a single layer of carbon atoms with great promise for future electronics – superconducting.
The study, performed in collaboration with Stanford University and the SLAC National Accelerator Laboratory is published in Nature Communications.
Graphene, a single sheet of carbon atoms arranged in a honeycomb pattern, is the thinnest and strongest known material and a great conductor of electricity, among other remarkable properties. Scientists hope to eventually use it to make ultra fast transistors, sensors and transparent electrodes. Despite its array of exciting properties, superconducting graphene, in which electricity is conducted without resistance, is yet to be achieved.
The classic way to make graphene is by peeling atomically thin sheets from a block of graphite. But it is possible to isolate these carbon sheets by chemically interweaving graphite with arrays of calcium atoms to form calcium intercalated graphite or CaC6. While it’s been known for nearly a decade that this material is superconducting the new study uncovers the mechanism of superconductivity in unprecedented detail. The work therefore points to a pathway to make graphene itself superconducting – something the scientific community has dreamed about for a long time, but failed to achieve.
The combination of high purity samples and state-of-the-art light scattering experiments permitted the scientists to distinguish what the electrons in each layer were doing, revealing details of their behaviour that had not been seen before. Before now researchers were unable to confirm whether CaC6’s superconductivity came from the calcium layer, the graphene layer or both. The new discovered that electronic states associated both the calcium layer and graphene together with the resulting interaction between the two are essential for superconductivity. Thus to realise superconductivity in single graphene sheets, arrays of metal atoms must be first arranged on its surface.
Although applications of superconducting graphene are speculative and far in the future they could include ultra-high frequency analogue transistors, nanoscale sensors and electromechanical devices and quantum computing devices.
Learn more: A Potential Way to Make Graphene Superconducting
The Latest on: Superconducting graphene
[google_news title=”” keyword=”superconducting graphene” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Superconducting graphene
- Graphene in Biomedicine: Opportunities and Challengeson February 29, 2024 at 4:00 pm
Graphene, whose discovery won the 2010 Nobel Prize in physics, has been a shining star in the material science in the past few years. Owing to its interesting electrical, optical, mechanical and ...
- David S Wisbey, Ph.D.on February 28, 2024 at 9:18 am
and graphene. Noise in electronics is a fundamental issue that occurs in many different areas including 2D materials and superconducting circuits. Decoherence is generated by materials which quantum ...
- How Graphene Batteries Are Poised to Revolutionize Cordless Power Toolson February 13, 2024 at 4:00 pm
But there’s a new material on the market for cordless tools: graphene, a lightweight material that has changed the battery game. The basic structure of graphene is a single layer of carbon atoms ...
- Fundamental equation for superconducting quantum bits revisedon February 13, 2024 at 4:00 pm
A superconducting junction made from a single 2D material promises to harness strange new physics Dec 8, 2023 Ballistic graphene Josephson junctions enter microwave circuits ...
- Unlocking quantum precision: Expanded superconducting strips for enhanced photon-counting accuracyon February 8, 2024 at 3:59 pm
Superconducting nanostrip single-photon detectors (SNSPDs) are considered the leading technology for single-photon detection. They offer near-perfect efficiency and high-speed performance.
- This Superconducting Experiment Just Broke Physicson January 31, 2024 at 7:00 am
“How a superconducting phase can be changed to another phase is an intriguing area of study,” Sanfeng Wu, who studies these transitions, said in a press release. “And we have been interested ...
- Researchers find evidence of long-lived valley states in bilayer graphene quantum dotson January 17, 2024 at 8:35 am
Superconducting qubits ... Ihn from the Department of Physics at ETH Zurich have been looking into bilayer graphene (BLG) quantum dots, known as a potential platform for spin qubits, to find ...
- From strength to strengthon January 10, 2024 at 11:50 am
Another unusual feature is that the graphene supports a finite supercurrent, even when the density of charge carriers is zero. Moreover, all the superconducting transistors made by the Delft group ...
- Graphene Breakthrough Ushers In New Era for Quantum Computingon January 10, 2024 at 3:59 am
possibly leading to quantum computers that are not only faster but also more reliable than those using current superconducting technology. Relevant articles: – World’s 1st graphene ...
via Bing News