Abstract
Materials hosting kagome lattices have drawn interest for the diverse magnetic and electronic states generated by geometric frustration. In the AV3Sb5 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 ScV6Sn6, a hexagonal HfFe6Ge6-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 AV3Sb5 compounds, but both modes have been anticipated in kagome metals. The diverse HfFe6Ge6 family offers more opportunities to tune ScV6Sn6 and explore density wave order in kagome lattice materials.
| Original language | English |
|---|---|
| Article number | 216402 |
| Journal | Physical Review Letters |
| Volume | 129 |
| Issue number | 21 |
| DOIs | |
| State | Published - Nov 18 2022 |
Funding
We thank I. I. Mazin for his discussions regarding charge density waves. M. A. M., R. P. H., and D. M. acknowledge support from the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. H. W. S. A., W. R. M., T. M., and R. X. acknowledge support from the Gordon and Betty Moore Foundation’s EPiQS Initiative, Grant No. GBMF9069. M. M. and H. C. acknowledge support from the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Early Career Research Program Award No. KC0402020, under Contract No. DE-AC05-00OR22725. This research used resources at the High Flux Isotope Reactor and the Spallation Neutron Source, the DOE Office of Science User Facility operated by ORNL. Powder XRD was performed at the Institute for Advanced Materials & Manufacturing (IAMM) Diffraction Facility with the assistance of Michael R. Koehler, located at the University of Tennessee, Knoxville. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan .
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Gordon and Betty Moore Foundation | GBMF9069 |
| Office of Science | |
| Basic Energy Sciences | DE-AC05-00OR22725, KC0402020 |
| Division of Materials Sciences and Engineering |
