Floating of the Modulation Wave and Phase Pinning in IncommensurateRb2ZnBr4

Abstract
Nuclear-magnetic-resonance measurements in incommensurate Rb2ZnBr4 show the existence of regions where the modulation wave is floating. The floating regions coexist with other regions where the modulation wave is static. Impurity phase pinning and a roughening of the modulation wave at higher temperatures is proposed to account for these effects.