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    light-induced ferromagnetism tagged posts

    Lasers Trigger Magnetism in Atomically Thin Quantum Materials

    April 21, 2022, Categories  Physics, Technology/Electronics

    A cartoon depiction of the light-induced ferromagnetism that the researchers observed in ultrathin sheets of tungsten diselenide and tungsten disulfide. Laser light, shown in yellow, excites an exciton – a bound pair of an electron (blue) and its associated positive charge, also known as a hole (red). This activity induces long range exchange interactions among other holes trapped within the moiré superlattice, orienting their spins in the same direction.Xi Wang/University of Washington

    Researchers have discovered that light – in the form of a laser – can trigger a form of magnetism in a normally nonmagnetic material. This magnetism centers on the behavior of electrons...

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