Overscreened Kondo effect, (color) superconductivity and Shiba states in Dirac metals and quark matter

Understand

We study the interplay between the Kondo effect and (color) superconductivity in doped Dirac metals with magnetic impurities and in quark matter with colorful impurities.

• We first point out that the overscreened Kondo effect arises in the normal state of these systems.
• Next the (color) superconducting gap is incorporated as a mean field and the phase diagram for a varying gap and temperature is constructed nonperturbatively.
• A rich phase structure emerges from a competition of effects unique to a multichannel system.