Detection of Exchange Interaction Through Fano-Like Interference Effects
We study Fano-like interference effects in connection with scanning tunneling microscopy experimental set-up of e.g. two-level systems. The physics of the systems suggests a mechanism that allows detection of the two-electron singlet-triplet exchange splitting in diatomic molecular systems. Different pathways for the tunneling electrons lead to interference effects and generate kinks in the differential conductance at the energies for the spin singlet and triplet states.
KeywordsGreen Function Triplet State Fano Resonance Sharp Feature Coupling Matrice