${\mathrm{ScV}}_6{\mathrm{Sn}}_6$ is a V-based kagome-lattice material similar to the ${\mathrm{AV}}_3{\mathrm{Sb}}_5$ (A = Cs, Rb, K) family. Unlike ${\mathrm{AV}}_3{\mathrm{Sb}}_5$, ${\mathrm{ScV}}_6{\mathrm{Sn}}_6$ exhibits a three-dimensional charge density wave (CDW) order and yet no superconductivity transition has been observed at low temperature. In this work, we confirm the $\sqrt{3}\times \sqrt{3}\times 3$ CDW via NMR and detect NMR signatures of the $\sqrt{3}\times \sqrt{3}\times 2$ short-range order. Above the CDW transition temperature $T_{\mathrm{CDW}}=88\mathrm{K}$, full width at half maximum of the NMR spectra reveals sensitivity to short-range order. Below $T_{\mathrm{CDW}}$, the NMR spectra corresponding to $[m=-7/2$ ↔ $-5/2]$ satellite transition of V split into two peaks, with an intensity ratio of 2:1. Detailed analyses show that a $\sqrt{3}\times \sqrt{3}\times 3$ charge density wave order in ${\mathrm{ScV}}_6{\mathrm{Sn}}_6$ is consistent with our experimental results.

Close

PrevNext

View figure in article

• Charge density waves
• Single crystal materials
• First-principles calculations
• Nuclear magnetic resonance