All articles tagged with #graphene
Scientists using graphene bilayers under a strong magnetic field observed excitons behaving as a superfluid at high density, but as density decreases the excitons halt and the material becomes insulating; heating restores the superfluid, a result that could point to a supersolid-like excitonic state or another unusual quantum phase, though measurements are not yet definitive.
Rice University researchers say Edison may have accidentally produced graphene while testing a carbon-filament light bulb, since heating carbon-based resistors above 2,000°C can yield turbostratic graphene—suggesting Edison could have encountered graphene long before its formal discovery, though he wouldn’t have known what it was.
Rice University researchers suggest Thomas Edison may have accidentally produced graphene in 1879 while testing carbon‑filament light bulbs with flash Joule heating; their experiments on bamboo filaments showed transient graphene formation that would quickly convert to graphite, implying Edison could have created a modern “wonder material” long before graphene’s official isolation.
Rice University researchers replicated Edison’s 1879 carbon‑filament bulb method and, using modern analysis, found evidence that turbostratic graphene formed in the heated carbon filament; while not definitive proof Edison himself produced graphene, the study shows how re‑examining historical experiments with current tools can reveal overlooked materials and spur new questions.
Scientists have developed a new form of graphene that significantly enhances supercapacitors' energy and power density, potentially enabling faster charging and higher capacity energy storage for electric vehicles, electronics, and household devices, overcoming previous limitations of space efficiency and charge speed.
The article discusses the visualization and analysis of interaction-driven restructuring of quantum Hall edge states in graphene using advanced scanning tunneling microscopy techniques, providing insights into the topological and electronic properties of these states.
Researchers at Monash University have developed a new graphene-based material called multiscale reduced graphene oxide (M-rGO) that significantly enhances supercapacitors, enabling them to store energy comparable to batteries while offering rapid charging and high power output, with potential for commercial applications in electric vehicles and electronics.
MIT researchers have discovered a new type of superconductivity in 'magic-angle' twisted tri-layer graphene, which could be a significant step toward developing room-temperature superconductors, potentially revolutionizing energy transmission and electronic devices.
MIT physicists have provided the most direct evidence yet of unconventional superconductivity in magic-angle twisted trilayer graphene (MATTG), revealing a distinct superconducting gap that suggests a different pairing mechanism than traditional superconductors, potentially paving the way for room-temperature superconductivity and advanced quantum technologies.
Researchers are exploring five advanced materials—metamaterials, graphene, MXene, carbon nanotubes, and ceramics—that could significantly enhance aircraft stealth capabilities by absorbing or deflecting radar signals, potentially making fighter jets nearly invisible to radar in the future.
Scientists have discovered that when tuned to its Dirac point, graphene defies the Wiedemann–Franz law, showing an inverse relationship between thermal and electrical conductivity, and behaves like a nearly perfect quantum fluid, opening new avenues for research in high-energy physics and astrophysics.
Researchers at IISc and collaborators have observed a quantum fluid of electrons in graphene, violating the Wiedemann-Franz law and revealing a Dirac fluid state with near-perfect fluidity, opening new avenues for quantum physics research and technological applications.
Scientists have discovered a 'Dirac fluid' in graphene, where electrons flow like a nearly perfect liquid, violating the traditional Wiedemann-Franz law and revealing a new exotic state of matter that could advance quantum technologies and fundamental physics research.
Researchers at IISc and collaborators have observed electrons in graphene behaving like a frictionless quantum fluid near the Dirac point, violating classical laws of conductivity and opening new avenues for quantum physics research and technological applications.
Proximity screening using atomically thin hBN and graphite gates significantly enhances the electronic quality of graphene, achieving record-high quantum mobilities (~10^7 cm^2/Vs), exceptional charge homogeneity, and enabling the observation of Landau quantization and quantum Hall effects at millitesla magnetic fields, although it suppresses some many-body phenomena.