Model study of adsorbed metallic quantum dots: Na on Cu(111)

Article

关键词: SCANNING-TUNNELING-MICROSCOPY;    VALENCE-ELECTRON STATES;    SURFACE-STATES;    JELLIUM MODEL;    LOCAL-DENSITY;    PHOTOEMISSION;    OVERLAYERS;    NANOWIRES;    WELL;    TEMPERATURE;   

DOI  :  10.1103/PhysRevB.66.235420

来源: SCIE

【 摘 要 】

We model electronic properties of the second-monolayer Na adatom islands (quantum dots) on the Cu(111) surface covered homogeneously by the first Na monolayer. An axially symmetric three-dimensional jellium model, taking into account the effects due to the first Na monolayer and the Cu substrate, has been developed. The electronic structure is solved within the local-density approximation of the density-functional theory using a real-space multigrid method. The model enables the study of systems consisting of thousands of Na atoms. The results for the local density of states are compared with differential conductance (dI/dV) spectra and constant current topographs from scanning tunneling microscopy.

【 授权许可】

Free