Revealing Optical Activity In Achiral Crystals
Researchers at the Institute of Science Tokyo have demonstrated Raman optical activity in an achiral, nonmagnetic crystal for the first time. This discovery, driven by ferroaxial order, challenges previous assumptions that such optical responses require chiral molecules or magnetic order.
Why it matters
This breakthrough expands the fundamental understanding of material symmetry and provides new techniques for identifying and developing advanced materials.
Raman optical activity, long thought to require chiral molecules or magnetic order, has been demonstrated in an achiral, nonmagnetic crystal by researchers at Institute of Science Tokyo. The effect arises through ferroaxial order, a coordinated rotation of atoms within the lattice, and is detected using circularly polarized Raman spectroscopy. These findings show that optically inactive materials can also display chirality-like optical responses and expand the scope of optical techniques for discovering new materials.
The article is a technical report on scientific research with no political or social bias.
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