On the implementation of the coexistence phase of antiferromagnetism and superconductivity in heavy-fermion intermetallides

The region of the state diagram in which the pressure-induced quantum phase transition occurs with the destruction of the antiferromagnetic ordering and the appearance of the superconductivity has been described within the periodic Anderson model. It has been shown that a microscopically homogeneous coexistence phase of antiferromagnetism and superconductivity is implemented in the vicinity of the critical point, which was experimentally found in the heavy-fermion compound CeRhIn$_5$. In this region, the pressure increase is accompanied by the experimentally observed strong growth of the effective fermion mass.