Frustrated Ising charge correlations in the kagome metal ScV${}_6$Sn${}_6$

Abstract

Here we resolve the real-space nature of the high-temperature, short-range charge correlations in the kagome metal ScV${}_6$Sn${}_6$. Diffuse scattering appears along a frustrated wave vector ${\text{q}}_H=(\frac{1}{3},\frac{1}{3},\frac{1}{2})$ at temperatures far exceeding the charge order transition $T_{CO}=92\mathrm{K}$, preempting long-range charge order with wave vectors along ${\text{q}}_{\bar{K}}=(\frac{1}{3},\frac{1}{3},\frac{1}{3})$. Using a combination of real space and reciprocal space analysis, we resolve the nature of the interactions between the primary out-of-plane Sc-Sn chain instability and the secondary strain-mediated distortion of the in-plane V kagome network. A minimal model of the diffuse scattering data reveals a high-temperature, short-ranged "zig-zag" phase of in-plane correlations that maps to a frustrated triangular lattice Ising model with antiferromagnetic interactions and provides a real-space understanding of the origin of frustrated charge order in this material.

7 pages, 4 figures

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Cited by in corpus (5)

• Stability frontiers in the AM${}_6$X${}_6$ kagome metals: The LnNb${}_6$Sn${}_6$ (Ln:Ce-Lu,Y) family and density-wave transition in LuNb${}_6$Sn${}_6$
• Kagome metals
• Diffuse Scattering from Correlated Electron Systems
• Interleaved bond frustration in a triangular lattice antiferromagnet
• Beyond kagome: $p$-bands in kagome metals