Superconductivity in a low carrier density system: A single crystal study of cubic Y${}_3$Ru${}_4$Ge${}_{13}$

Abstract

We have successfully grown the single crystal of a low carrier density system Y${}_3$Ru${}_4$Ge${}_{13}$ which crystallizes in the cubic crystal structure with the space group Pm3n. Y${}_3$Ru${}_4$Ge${}_{13}$ exhibits super conductivity below 2.85 K as determined from the electrical resistivity, magnetic susceptibility and heat capacity measurements. The bulk measurements indicate multiband superconductivity in this low carrier system. Hall effect measurements show that the Hall coefficient R${}_H$ is positive and it decreases rapidly with temperature which is highly unusual. The simple estimation of the carrier concentration gives a value (\sim 10${}^{20}$/cm${}^3$) which is 2-3 orders of magnitude lower than that of a conventional metal like Cu which seems to suggest that Y${}_3$Ru${}_4$Ge${}_{13}$ is a semimetal that display multiband superconductivity.

8pages, 8 figures

References in corpus (1)

• Superconductivity in the topological semimetal YPtBi

Cited by in corpus (4)

• {Multiband Superconductivity in Lu${}_3$Os${}_4$Ge${}_{13}$
• Nodeless superconductivity and the peak effect in the quasi-skutterudites ${\mathrm{Lu}}_3{\mathrm{Os}}_4{\mathrm{Ge}}_{13}$ and ${\mathrm{Y}}_3{\mathrm{Ru}}_4{\mathrm{Ge}}_{13}$
• Broken time-reversal symmetry in cubic skutterudite-like superconductor Y${}_3$Ru${}_4$Ge${}_{13}$
• Anomalous temperature dependence of the electrical resistivity in R${}_3$Co${}_4$Ge${}_{13}$ (R = Y, Lu) single crystals