Revisiting the 63Cu NMR Signature of Charge Order in La1.875Ba0.125CuO4

We use single crystal $^{63}$Cu NMR techniques to revisit the early NQR signature of charge order observed for La$_{1.875}$Ba$_{0.125}$CuO$_{4}$ ($T_{\text{c}} =4$~K) [A. W. Hunt et al., Phys. Rev. Lett. {\bf 82}, 4300 (1999)]. show that growth spin correlations is accelerated below $\sim 80$~K, where inverse Laplace transform (ILT) T$_{1}$ analysis $^{139}$La spin-lattice relaxation curve recently uncovered emergence slow components in lattice and/or fluctuations [P. M. Singer 101}, 174508 (2020)]. From accurate measurements signal intensity, echo decay $M(2\tau)$, rate $^{63}1/T_1$, and its density distribution function $P(^{63}1/T_{1})$, we also demonstrate at $T_{\text{charge}}\simeq 54$~K turns on strong enhancement {\it within ordered domains}, thereby making CuO$_2$ planes extremely inhomogeneous. The domains grow quickly $T_{\text{charge}}$, volume fraction $F_{\text{CA}}$ canonical unaffected by gradually diminishes 35$~K. This finding agrees with our independent estimations based entirely ILTT$_{1}$ analyses, but a stark contrast much slower La$_{1.885}$Sr$_{0.115}$CuO$_{4}$ from 80$~K $T_{\text{c}}\simeq 30$~K.