  Here, we report that K-doped BaMn2Bi2 shows no experimental evidence of
superconductivity down to 1.5 K under pressures up to 35.6 GPa, however, a
tetragonal to an orthorhombic phase transition is observed at pressure of 20
GPa. Theoretical calculations for the tetragonal and orthorhombic phases, on
basis of our high-pressure XRD data, find that the AFM order is robust in both
of the phases in pressurized Ba0.61K0.39Mn2Bi2. Our experimental and
theoretical results suggest that the K-doped BaMn2Bi2 belongs to a strong Hunds
AFM metal with a hybridization of localized spin electrons and itinerant
electrons, and that its robust AFM order essentially prevents the emergence of
superconductivity.
