YCr6Ge6 as a Candidate Compound for a Kagome Metal

Abstract

We show that YCr6Ge6, comprising a kagome lattice made up of Cr atoms, is a plausible candidate compound for a kagome metal that is expected to exhibit anomalous phenomena such as flat-band ferromagnetism. Resistivity, magnetization, and heat capacity are measured on single crystals of YCr6Ge6, and band structure calculations are performed to investigate the electronic structure. Curie-Weiss-like behavior in magnetic susceptibility, T2 dependence in resistivity, and a Sommerfeld coefficient doubly enhanced from a calculated value indicate a moderately strong electron correlation. Interestingly, the in-plane resistivity is twice as large as the interplane resistivity, which is contrary to the simple expectation from the layered structure. Band structure calculations demonstrate that there are partially flat bands slightly below the Fermi level near the Γ point, which is ascribed to Cr 3d3z2-r2 bands and may govern the properties of this compound.

14 pages

References in corpus (7)

• High temperature fractional quantum Hall states
• Doped Kagome System as Exotic Superconductor
• Giant anomalous Hall resistivity of the room temperature ferromagnet Fe3Sn2 - a frustrated metal with the kagome-bilayer structure
• Non-collinearity and spin frustration in the itinerant kagome ferromagnet Fe3Sn2
• Mott transition in Kagomé lattice Hubbard model
• Chirality-driven mass enhancement in the kagome Hubbard model
• Direct observation of Fe spin reorientation in single crystalline YbFe6Ge6

Cited by in corpus (14)

• Massive Dirac fermions in a ferromagnetic kagome metal
• Anisotropic magnetic property of single crystals $R$V${}_6$Sn${}_6$ ($R$ = Y, Gd - Tm, Lu)
• Quantum Interactions in Topological R166 Kagome Magnet
• GdV6Sn6: a Multi-carrier Metal with Non-magnetic 3d-electron Kagome Bands and 4f-electron Magnetism
• Twisting of 2D kagomé sheets in layered intermetallics
• Robust flat bands in RCo5 (R=rare earth) compounds
• Triangular Kondo lattice in $\mathrm{Yb}{\mathrm{V}}_6\mathrm{S}{\mathrm{n}}_6$ and its quantum critical behaviors in magnetic field
• Evidence of orbit-selective electronic kagome lattice with planar flat-band in correlated paramagnetic YCr6Ge6
• Kagome metals
• Diverse electronic landscape of the kagome metal YbTi3Bi4
• Coexisting Kagome and Heavy Fermion Flat Bands in YbCr${}_6$Ge${}_6$
• Magnetic order and physical properties of the Kagome metal UNb${}_6$Sn${}_6$
• Structural modulation, physical properties, and electronic band structure of the kagome metal UCr${}_6$Ge${}_6$
• Diverse electronic topography in a distorted kagome metal LaTi3Bi4