Direct Observation of the Charge-Density Wave in Potassium by Neutron Diffraction

Abstract

Sharp charge-density-wave satellites in potassium have been located at (0.995, 0.975, 0.015). They are smaller than the {110} reflections by ∼ ${10}^5$, and each is surrounded by a prolate ellipsoidal cloud of diffuse phason scattering having its major axis along a line through the point (1,1,0).