Spin-resolved spectra of Shiba multiplets from Mn impurities in MgB2
Abstract
We study the effect of magnetic Mn ions on the two-band superconductor MgB2, and compute both the total and spin resolved scanning tunneling spectrum in the vicinity of the magnetic impurity. We show that when the internal structure of the Mn ion's d-shell is taken into account, multiple Shiba states appear in the spectrum. The presence of these multiplets could alter significantly the overall interpretation of local tunneling spectra for a wide range of superconducting hosts and magnetic impurities.
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