Incommensurate spin-density wave and multiband superconductivity in Na${}_x$FeAs as revealed by nuclear magnetic resonance

M. Klanjsek, P. Jeglic, B. Lv +3

We report a ${}^{23}$Na and ${}^{75}$As nuclear magnetic resonance (NMR) investigation of Na${}_x$FeAs series ($x=1$, 0.9, 0.8) exhibiting a spin-density wave (SDW) order below $T_{\rm…