Abstract
Nuclear magnetic resonance (NMR) measurements of chains of detwinned ortho-II (YBCO6.5) single crystals reveal unusual and remarkable properties. The chain Cu resonance broadens significantly, but gradually, on cooling from room temperature. The line shape and its temperature dependence are substantially different from that of a conventional spin/charge density wave (S/CDW) phase transition. Instead, the line broadening is attributed to small amplitude static spin and charge density oscillations with spatially varying amplitudes connected with the ends of the finite length chains. The influence of this chain phenomenon is also clearly manifested in the plane Cu NMR.
- Received 26 February 2006
DOI:https://doi.org/10.1103/PhysRevB.73.212506
©2006 American Physical Society