Superconductivity at 2.5 K in new transition-metal chalcogenide Ta2PdSe5

Abstract

We report the synthesis and superconducting properties of a new transition-metal chalcogenide Ta${}_2$PdSe${}_5$. The measurements of resistivity, magnetization, and specific heat reveal that Ta${}_2$PdSe${}_5$ is a bulk superconductor with $T_c$ $\simeq$ 2.5 K. The zero-field electronic specific heat in the superconducting state can be fitted with a two-gap BCS model. The upper critical field $H_{c2}$ shows a linear temperature dependence, and the value of $H_{c2}$(0) is much higher than the estimated Pauli limiting field $H_{c2}^P$ and orbital limiting field $H_{c2}^{orb}$. All these results of specific heat and upper critical field suggest that Ta${}_2$PdSe${}_5$ is a multi-band superconductor.

5 pages, 4 figures, 1 table

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Cited by in corpus (4)

• Pressure-induced superconductivity in quasi-one-dimensional semimetal ${\mathrm{Ta}}_2{\mathrm{PdSe}}_6$
• Enhanced superconductivity in hole-doped Nb${}_2$PdS${}_5$
• Multiband Semimetallic Electronic Structure of Superconducting Ta2PdSe5
• Evidence for nodal superconductivity in a layered compound Ta${}_4$Pd${}_3$Te${}_{16}$