Confirmation of McMillan's Concept of "Discommensurations"

Abstract
Se77 NMR is used to study a proposal made by McMillan regarding the charge-density wave (CDW) in 2H-TaSe2. The dependence of the NMR line shape is compared with predictions based on McMillan's theory. McMillan's hypothesis of "discommensurations" is confirmed—that the so-called incommensurate CDW is best described by commensurate regions separated by regions of phase slip.