Structural and physical properties of the ${\mathrm{Yb}}_3{\mathrm{Rh}}_4{\mathrm{Sn}}_{13}$ Remeika phase are investigated on large single crystals grown from Sn-flux. It crystallizes with disordered ${\mathrm{Y}}_3{\mathrm{Co}}_4{\mathrm{Ge}}_{13}$ structure type [space group $Pm\overline{3}n, a=9.6709\left(2\right)$ Å], where the $24k$ crystallographic site occupied by Sn atoms is split. ${\mathrm{Yb}}_3{\mathrm{Rh}}_4{\mathrm{Sn}}_{13}$ is a superconductor (SC) with the critical temperature $T_{\mathrm{c}}=7.63\left(5\right)$ K, lower [$B_{\mathrm{c}1}=14.5\left(5\right)$ mT] and upper [$B_{\mathrm{c}2}\left(0\right)=2.89\left(5\right)$ T] critical fields, as well as a clear peak effect with $B^{*}\left(0\right)=1.96\left(9\right)$ T observed in the $M\left(H\right)$ loops. $B_{\mathrm{c}2}\left(T_{\mathrm{c}}\right)$ can be described by the sum of two Werthamer-Helfand-Hohenberg equations. A $\gamma \left(B\right)\propto B^{0.75}$ dependency is found. The electronic specific heat below $T_{\mathrm{c}}$ follows an exponential function including 87% of a strongly coupled [${\mathrm{\Delta }}_1/k_B{T}_{\mathrm{c}}=3.52\left(1\right)$] and 13% of a conventional $s$-wave-like [${\mathrm{\Delta }}_2/k_{\mathrm{B}}{T}_{\mathrm{c}}=1.32\left(1\right)$] gap. The observations are in line with ${\mathrm{Yb}}_3{\mathrm{Rh}}_4{\mathrm{Sn}}_{13}$ being a two-gap SC. The Remeika phase reveals a complex electronic band structure studied by Hall coefficient ($R_{\mathrm{H}}$) measurements and calculations performed within the density functional theory. A “rattling” effect in ${\mathrm{Yb}}_3{\mathrm{Rh}}_4{\mathrm{Sn}}_{13}$ is discussed based on structural refinements and phononic contributions to its specific heat capacity.

• Received 14 July 2023
• Revised 10 November 2023
• Accepted 16 November 2023

DOI:https://doi.org/10.1103/PhysRevB.108.214515