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    Category Physics

    Researchers use Electron Microscope to turn Nanotube into Tiny Transistor

    December 27, 2021, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    A designer view of a single-wall carbon nanotube intramolecular junction with metallic portions on left and right ends and a semiconductor ultrashort ~3,0nm channel in between. Credit: National University of Science and Technology, Moscow

    An international team of researchers have used a unique tool inserted into an electron microscope to create a transistor that’s 25,000 times smaller than the width of a human hair.

    The research, published in the journal Science, involves researchers from Japan, China, Russia and Australia who have worked on the project that began five years ago.

    QUT Center for Materials Science co-director Professor Dmitri Golberg, who led the research project, said the result was a “very interesting fundamental discovery” which could lead a way for the future d...

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    Machine Learning Models Quantum Devices

    December 24, 2021, Categories  Physics

    Quantum reservoir computing. B and F represent the input and output states, respectively, of a quantum system. E is an auxiliary system necessary to pass the sequence of input states B to the quantum reservoir S. S can then be read to emulate F without disrupting the system. ©2021 Tran et al.

    A novel algorithm allows for efficient and accurate verification of quantum devices. Technologies that take advantage of novel quantum mechanical behaviors are likely to become commonplace in the near future. These may include devices that use quantum information as input and output data, which require careful verification due to inherent uncertainties. The verification is more challenging if the device is time dependent when the output depends on past inputs...

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    Semiconductors reach the Quantum World

    December 23, 2021, Categories  Physics, Technology/Electronics

    The “map” of the electrons: This graph, obtained with the SX-ARPES method, shows bright bands representing the states that electrons occupy in energy/momentum space. The band in the semiconductor gallium nitride (GaN) is clearly separated from the superconducting states (encircled in light blue dashes) in the niobium nitride (NbN). This means that the decisive electrons in the two materials do not interfere with each other. Credit: Paul Scherrer Institute/Tianlun Yu

    Quantum effects in superconductors could give semiconductor technology a new twist...

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    Magnetic ‘hedgehogs’ could Store Big Data in a Small Space

    December 21, 2021, Categories  Physics, Technology/Electronics

    Magnetic patterns that are similar to a hedgehog’s spikes could lead to more efficient — and larger-scale — data storage, a new study has found.
    Image credit: Getty Images

    New study reveals a zoo of magnetic patterns at the atomic scale. Atomic-scale magnetic patterns resembling a hedgehog’s spikes could result in hard disks with massively larger capacities than today’s devices, a new study suggests. The finding could help data centers keep up with the exponentially increasing demand for video and cloud data storage.

    In a study published today in the journal Science, researchers at The Ohio State University used a magnetic microscope to visualize the patterns, formed in thin films of an unusual magnetic material, manganese germanide...

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