Kagome surface states and weak electronic correlation in vanadium-kagome metals.

R V 6 Sn 6 ( R = Y and lanthanides) with two-dimensional vanadium-kagome surface states is an ideal platform to investigate kagome physics and manipulate the kagome features to realize novel phenomena. Utilizing the micron-scale spatially resolved angle-resolved photoemission spectroscopy and first-principles calculations, we report a systematical study of the electronic structures of R V 6 Sn 6 ( R = Gd, Tb, and Lu) on the two cleaved surfaces, i.e., the V- and R Sn1-terminated (001) surfaces. The calculated bands without any renormalization match well with the main ARPES dispersive features, indicating the weak electronic correlation in this system. We observe 'W'-like kagome surface states around the Brillouin zone corners showing R -element-dependent intensities, which is probably due to various coupling strengths between V and R Sn1 layers. Our finding suggests an avenue for tuning electronic states by interlayer coupling based on two-dimensional kagome lattices.&#xD.