  Electronic properties of kagome lattice have drawn great attention recently.
In associate with flat-band induced by destructive interference and Dirac
cone-type dispersion, abundant exotic phenomena have been theoretically
discussed. The material realization of electronic kagome lattice is a crucial
step towards comprehending kagome physics and achieving novel quantum phases.
Here, combining angle-resolved photoemission spectroscopy, transport
measurements and first-principle calculations, we expose a planar flat-band in
paramagnetic YCr6Ge6 as a typical signature of electronic kagome lattice. We
unearth that the planar flat-band arises from the d_(z^2 ) electrons with
intra-kagome-plane hopping forbidden by destructive interference. On the other
hand, the destructive interference and flatness of the d_(x^2-y^2 ) and d_xy
bands are decomposed possibly due to additional in-plane hopping terms, but the
Dirac cone-type dispersion is reserved near chemical potential. We explicitly
unveil that orbital character plays an essential role to realize electronic
kagome lattice in bulk materials with transition metal kagome layers.
Paramagnetic YCr6Ge6 provides an opportunity to comprehend intrinsic properties
of electronic kagome lattice as well as its interplays with spin orbit coupling
and electronic correlation of Cr-3d electrons, and be free from complications
induced by strong local moment of ions in kagome planes.
