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Kagome magnets are expected to feature emergent properties due to theinterplays among geometry, magnetism, electronic correlation, and bandtopology. The magnetism and topological electronic states can be tuned via therare earth engineering in RV6Sn6 kagome metals, where R is a rare earthelement. Herein, we present the synthesis and characterization of SmV6Sn6, ametal with two-dimensional kagome nets of vanadium and frustrated triangular Smlattice. Partial of the Sm atoms are shifted from the normal R positions by c/2along the c axis. Magnetic measurements reveal obvious anisotropy, where theeasy magnetic axis is within the ab plane. Electronic transports show multibandbehaviors below 200 K. Density functional theory calculations find that theelectronic structure of SmV6Sn6 hosts flat bands, Dirac cone, and saddle pointarising from the V-3d electrons near the Fermi level. No evidence for theexistence of charge density wave or magnetic order down to 2 K can be observed.Thus, SmV6Sn6 can be viewed as a modest disordered derivative of the RV6Sn6structure, in which the disordered rare earth ions can suppress the magneticorder and charge density wave in the RV6Sn6 kagome family.

Anisotropic magnetism and electronic properties of the kagome metal SmV6Sn6