Based on energy dependent Green's functions, we developed a simulation for the microscopic part of a scanning tunnelling microscope. This simulation is capable of reproducing STM images of simple metallic surfaces, quantum corrals and quantum mirages. The simulation is based on a scattering theory, which has been established to deal adequately with localised sources. This theory permits a completely three dimensional description of an STM. Furthermore, this framework can be extended in several ways. For instance, it can take into account multipole sources. This enables a more realistic simulation of experimental pictures, since the high resolution of an STM achieved with e.g. tungsten tips is attributed to the fact that the electrons originate from d orbitals. In addition, the theory can also be extended to describe the anomalous scattering properties of Kondo adatoms. Thus the simulation can also reproduce the recent experimental results observed in the Kondo mirage.
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Based on energy dependent Green's functions, we developed a simulation for the microscopic part of a scanning tunnelling microscope. This simulation is capable of reproducing STM images of simple metallic surfaces, quantum corrals and quantum mirages. The simulation is based on a scattering theory, which has been established to deal adequately with localised sources. This theory permits a completely three dimensional description of an STM. Furthermore, this framework can be extended in several w...
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