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We have successfully grown the single crystal of a low carrier density systemY$_3$Ru$_4$Ge$_{13}$ which crystallizes in the cubic crystal structure with thespace group Pm3n. Y$_3$Ru$_4$Ge$_{13}$ exhibits super conductivity below 2.85 Kas determined from the electrical resistivity, magnetic susceptibility and heatcapacity measurements. The bulk measurements indicate multibandsuperconductivity in this low carrier system. Hall effect measurements showthat the Hall coefficient R$_H$ is positive and it decreases rapidly withtemperature which is highly unusual. The simple estimation of the carrierconcentration gives a value (\sim 10$^{20}$/cm$^3$) which is 2-3 orders ofmagnitude lower than that of a conventional metal like Cu which seems tosuggest that Y$_3$Ru$_4$Ge$_{13}$ is a semimetal that display multibandsuperconductivity.

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