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arXiv · 2205.04582

Charge density wave in kagome lattice intermetallic ScV6Sn6

Hasitha W. Suriya Arachchige·William R. Meier·Madalynn Marshall·Takahiro Matsuoka·Rui Xue·Michael A. McGuire·Raphael P. Hermann·Huibo Cao·David Mandrus
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Abstract

Materials hosting kagome lattices have drawn interest for the diverse magnetic and electronic states generated by geometric frustration. In the $A$V$_3$Sb$_5$ compounds ($A$ = K, Rb, Cs), stacked vanadium kagome layers give rise to unusual charge density waves (CDW) and superconductivity. Here we report single-crystal growth and characterization of ScV$_6$Sn$_6$, a hexagonal HfFe$_6$Ge$_6$-type compound that shares this structural motif. We identify a first-order phase transition at 92 K. Single crystal X-ray and neutron diffraction reveal a charge density wave modulation of the atomic lattice below this temperature. This is a distinctly different structural mode than that observed in the $A$V$_3$Sb$_5$ compounds, but both modes have been anticipated in kagome metals. The diverse HfFe$_6$Ge$_6$ family offers more opportunities to tune ScV$_6$Sn$_6$ and explore density wave order in kagome lattice materials.

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Hasitha W. Suriya Arachchige, William R. Meier, Madalynn Marshall, Takahiro Matsuoka, Rui Xue, Michael A. McGuire, Raphael P. Hermann, Huibo Cao, David Mandrus. 2022-06-20. Charge density wave in kagome lattice intermetallic ScV6Sn6. https://doi.org/10.1103/physrevlett.129.216402

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