|Organization or Institution||Florida State University|
Stabilization of vanadium ditelluride through iron intercalation
Milo Adams, Judith Clark, V. Ovidiu Garlea, Michael Shatruk
Florida State University Department of Chemistry & Biochemistry
Vanadium ditelluride, VTe2, has been postulated to exhibit a range of unique magnetic and topological properties. Nevertheless, the confirmation of the theoretically predicted behavior remains elusive, due to air-sensitivity of bulk VTe2. We demonstrate that plate-like crystals of Fe0.18VTe grown via chemical vapor transport are air-stable, unlike pure VTe2 which is readily oxidized. Elemental composition was confirmed by energy-dispersive X-ray spectroscopy. Single-crystal X-ray diffraction showed that the material crystallizes in the trigonal space group P-3m1, which matches the symmetry of the VTe2 structure. Magnetic measurements revealed that Fe0.18VTe2 exhibits ferromagnetic (FM) ordering around 120 K. Density-functional theory calculations on Fe0.25VTe2 suggest an FM ground state, in which both Fe and V atoms carry a moment of ~1.6 μB/atom at 0 K. The present study suggests that transition metal intercalation of VTe2 leads to a more stable structure, well-suited for more in-depth characterization, e.g., by transport and magnetoresistance measurements.