Graphene’s strange twist is a boon for true superconductivity: Study

The article discusses recent research on magic-angle twisted trilayer graphene (MATG), a novel form of graphene composed of three atom-thick layers twisted at specific angles, which exhibits unconventional superconductivity. Unlike traditional superconductors, MATG’s superconducting behavior defies established theories, making it a subject of intense scientific investigation. Researchers constructed Josephson junctions incorporating MATG to probe its superconducting properties beyond simple resistance measurements, confirming true superconductivity through observations such as magnetic field expulsion and Cooper pair formation. A key finding of the study is MATG’s exceptionally high kinetic inductance—about 50 times greater than most known superconductors—indicating that Cooper pairs in MATG respond very slowly to changing currents. This property is highly desirable for quantum technologies, including ultra-sensitive photon detectors and superconducting qubits for quantum computing. Additionally, the researchers identified an inverse relationship between kinetic inductance and critical current, shedding light on the coherence length of the superconducting electron pairs. Although MATG is not