Mapping of electronic wave functions in II-VI semiconductor quantum wells via electron paramagnetic resonance

We examine the shift of the electron paramagnetic resonance of substitutional (Formula presented) ions induced by exchange interaction with band electrons in a II-VI semiconductor quantum well. We show that such a shift is directly proportional to the local electron probability density which the (Formula presented) ion “sees” at its specific site. Based on this, we demonstrate that (Formula presented) ions can be used as built-in localized probes for mapping the spatial distribution of the wave function amplitudes of electronic states confined in the quantum well.