Graphene just defied a fundamental law of physics - Science Daily

We’re sharing this article early to provide faster access to peer-reviewed, accepted research. It is citable and carries a permanent DOI. This version is subject to further edits and will be replaced automatically by the final Version of Record. All legal disclaimers apply. AbstractIn this paper, we examine the transmission probability through a symmetric double bilayer-graphene junction modulated by Fano-type interference. At oblique incidence, two trajectories generated by Fano resonances and a quasi-bound well state are combined to generate perfect Fano interference resulting in null electron transmission. Interestingly, the transmission can be changed between normal and anomalous simply by adjusting the relative phase of the Fano resonances due to the appropriate modulation of the incidence angle, height of potential, and barrier and well width. This phenomenon is similar to electromagnetically induced absorption or to phase control of light propagation in quantum wells via Fano interference.

Voltage fluctuations, light fluctuations, temperature fluctuations—any fluctuations are troublesome and thus undesirable. They don't just cause discomfort; in engineering and medical applications, they affect the accuracy of measurements or introduce errors in controls. Even at the minute level of quantum phenomena, fluctuations are considered undesirable. But what if some fluctuations can be made useful? A theoretical study from the Indian Institute of Technology Bombay (IIT Bombay) shows that structured quantum fluctuations in light can be used to sense and generate useful quantum optical signals.

image: Researchers have shown that tiny wrinkles in graphene can change the material’s electrical properties. By harnessing this characteristic, scientists may one day control electricity in atomically thin materials — such as graphene — by changing their shape instead of adding new chemicals or materials, potentially powering more responsive sensors and ultrathin electronic devices. UNIVERSITY PARK, Pa. — Tiny wrinkles could reveal new behaviors in graphene, an exceptionally strong, conductive and thin material used in batteries, computer chips and other electronics. According to a new study published in Advanced Materials, small bends in graphene’s two-dimensional (2D), or one-atom-thick, structure can change the material’s electrical properties.