Directly imaging quantum states in two-dimensional materials

When some semiconductors absorb light, excitons (or particle pairs made of an electron bound to an electron hole) can form. Two-dimensional crystals of tungsten disulfide (WS2) have unique exciton states that are not found ...

Novel crystal compound melts under ultraviolet light

While many materials melt when heated, researchers from Japan recently discovered a novel material in which melting can be induced by ultraviolet light instead of heat. Even more intriguing, this material exhibits changes ...

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