NMR investigation of charge order in YBa$_{2}$Cu$_{3}$O$_{\mathrm{y}}$ in high magnetic fields

Recent observation of the charge-density-wave (CDW) order or CDW fluctuations in underdoped YBa$_{2}$Cu$_{3}$O$_{\mathrm{y}}$ (YBCO) marks an important step in high-$T_{\mathrm{C}}$ research because it lends support to the idea that charge ordering is a generic instability of the pseudogap state. However, the relevance of these results to the understanding of superconductivity remains unclear. An important question is how charge ordering evolves as a function of doping across the phase diagram. Here, we expand our previous work [1] and report high-field $^{17}$O NMR evidence of charge order in YBCO with doping level $p = $0.09 and $p = $0.13. We discuss the evolution of the temperature and field scales characterizing the CDW transition.\\[4pt] [1] T. Wu \textit{et al.} \textit{Nat.} \textit{Commun.}\textbf{4}, 2113 (2013).