作者: P. Bastie , F. Mogeon , C. M. E. Zeyen
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摘要: We have used very high-resolution neutron diffraction to prove the existence of a "single-$\mathbf{q}$" incommensurate quartz phase at zero stress directly. The transition from single-$\mathbf{q}$ "triple-$\mathbf{q}$" state is first order.