Electronic Structure and Reentrant Magnetism in Superconducting ErRh4B4

Abstract

Results of ab initio self-consistent energy-band calculations on the full 18-atom/unit-cell ternary alloys $M{\mathrm{Rh}}_4{\mathrm{B}}_4$ ($M=\mathrm{Y},\mathrm{E}\mathrm{r}\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{H}\mathrm{o}$) are reported and used to discuss their superconducting and magnetic properties—including the observation of reentrant magnetism in the normal state at $T<\mathrm{}0.9\mathrm{}$ K in Er${\mathrm{Rh}}_4$ ${\mathrm{B}}_4$.