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    Category Technology/Electronics

    Paving the way for Spintronic RAMs: A deeper look into a powerful spin phenomenon

    January 1, 2020, Categories  Physics, Technology/Electronics

    Figure 1. An extremely simple MRAM
    An extremely simple MRAM

    The proposed combination of materials serves as a memory unit by supporting read and write operations. The spin injection by the topological insulator (TI) material reverses the magnetization of the ferromagnetic (FM) material, representing the “write” operation. Furthermore, the spin injection can also change the overall resistance of the materials, which can be sensed through an external circuit, representing the “read” operation.

    Scientists at Tokyo Institute of Technology (Tokyo Tech) explore a new material combination that sets the stage for magnetic random access memories, which rely on spin – an intrinsic property of electrons – and could outperform current storage devices...

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    Device Splits and Recombines Superconducting Electron Pairs

    December 30, 2019, Categories  Physics, Technology/Electronics

    image of Josephson junction
    A Josephson junction can split and recombine Cooper pairs of electrons as they travel through two nanowires.

    A device that can separate and recombine pairs of electrons may offer a way to study an unusual form of superconductivity, according to RIKEN physicists. This superconducting state would involve exotic particles, Majorana fermions that could prove useful in developing quantum computers.

    In conventional superconductors, electrical current flows with no resistance due to electrons teaming up to make ‘Cooper pairs’. A superconductor touching a normal conductor can sometimes induce superconductivity in that conductor through Cooper pairs from the superconductor penetrating the normal conductor.

    Now, Sadashige Matsuo of the RIKEN Center for Emergent Matter Science and collea...

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    New Nano-barrier for Composites could Strengthen Spacecraft Payloads

    December 27, 2019, Categories  Physics, Technology/Electronics, Astronomy/Space

    Stress modelling within CFRP and coated components. Credit: Nature Materials (2019). DOI: 10.1038/s41563-019-0565-3

    The University of Surrey has developed a robust multi-layed nano-barrier for ultra-lightweight and stable carbon fibre reinforced polymers (CFRPs) that could be used to build high precision instrument structures for future space missions.

    CFRP is used in current space missions, but its applications are limited because the material absorbs moisture. This is often released as gas during a mission, causing the material to expand and affect the stability and integrity of the structure. Engineers try to minimise this problem with CFRP by performing long, expensive procedures such as drying, recalibrations and bake-out- all of which may not completely resolve the issue.

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    First Chip-to-Chip Quantum Teleportation harnessing Silicon Photonic Chip Fabrication

    December 26, 2019, Categories  Physics, Technology/Electronics

    A. Chip Schematic. Black lines represent single mode waveguides for the single photons, red and blue pulses represent the photon energy in each path. Yellow bars represent external phase control. B. Teleportation setup. C. Entanglement swapping setup. D. 4-photon GHZ state preparation. Credit: University of Bristol

    The development of technologies which can process information based on the laws of quantum physics are predicted to have profound impacts on modern society. For example, quantum computers may hold the key to solving problems that are too complex for today’s most powerful supercomputers, and a quantum internet could ultimately protect the worlds information from malicious attacks...

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