Moire-induced electronic structure modifications in monolayer V_2S_3 on Au(111)

摘要

There is immense interest in how the local environment influences the electronic structure of materials at the single-layer limit. We characterize moire induced spatial variations in the electronic structure of in situ grown monolayer V_2S_3 on Au( 111) by means of low-temperature scanning tunneling microscopy and spectroscopy. We observe a long-range modulation of the integrated local density of states (LDOS), and quantify this modulation with respect to the moire superstructure for multiple orientations of the monolayer with respect to the substrate. Scanning tunneling spectroscopy reveals a prominent peak in the LDOS, which is shifted in energy at different points of the moire superstructure. Comparing ab initio calculations with angle-resolved photoemission. we are able to attribute this peak to bands that exhibit a large out of plane d-orbital character. This suggests that the moire driven variations in the measured density of states are driven by a periodic modulation of the monolayer-substrate hybridization.