Theoretical prediction of a highly responsive material: Spin fluctuations and superconductivity in FeNiB_2 system

摘要

By analyzing the Fe-Ni-B compositional diagram, we predict an energetically and dynamically stable FeNiB2 compound. This system belongs to the class of highly responsive state of materials, as it is very sensitive to the external perturbations. This state is also characterized by a high level of spin fluctuations, which strongly influence possible magnetic long- and short-range orders. Furthermore, we demonstrate that these antiferromagnetically dominating fluctuations could lead to the appearance of spin mediated superconductivity. The obtained results suggest a promising avenue for the search of strong spin fluctuation systems and related superconductors.