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Structural Helix Puts a Spin on Phonons

Scientific Achievement: First-principles simulations and neutron scattering reveal conservation of hidden angular momenta for electrons and phonons in materials with structural twisting of coupled rotations and translations.

Significance and Impact: Symmetry-derived global rules advance understanding of quasiparticle interactions and topologies toward discovery of materials with novel functionalities.

DOI: 10.1016/j.mtphys.2021.100548


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