• Study unveils a large tunable drag response between a normal conductor and a superconductor

    Updated: 2023-01-31 14:30:01
    The Coloumb drag is a phenomenon that affects two electronic circuits, whereby a charge current in one circuit induces a responsive current in a neighboring circuit solely through so-called Coloumb interactions. These are electrostatic interactions between electric charges that follow Coulomb's law, the key physics theory describing classical electrodynamics.

  • Superconductivity switches on and off in 'magic-angle' graphene

    Updated: 2023-01-30 16:24:34
    Physicists have found a new way to switch superconductivity on and off in magic-angle graphene. The discovery could lead to ultrafast, energy-efficient superconducting transistors for 'neuromorphic' electronics that operate similarly to the rapid on/off firing of neurons in the human brain.

  • Stability of perovskite solar cells reaches next milestone

    Updated: 2023-01-27 18:11:45
    Perovskite semiconductors promise highly efficient and low-cost solar cells. However, the semi-organic material is very sensitive to temperature differences, which can quickly lead to fatigue damage in normal outdoor use. Adding a dipolar polymer compound to the precursor perovskite solution helps to counteract this. The solar cells produced in this way achieve efficiencies of well above 24 %, which hardly drop under rapid temperature fluctuations between -60 and +80 Celsius over one hundred cycles. That corresponds to about one year of outdoor use.

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