Dear Siesters, I need to simulate scanning tunneling spectroscopy (STS) spectra of the surface accurately. I am especially interested in excited states (empty states in STM, taken at '+'). The results as calculated in Siesta LDA are good for filled states STM, but in disagreement with experiment for empty states.
Can anybody recommend me something? It looks like I need to take into account quasiparticles corrections (like in GW approximation). Is GW approximation implemented in Siesta? Or will be in near future? Kind regards Ruslan Zhachuk
