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arXiv · 1412.6983

Superconductivity at 2.5 K in new transition-metal chalcogenide Ta2PdSe5

J. Zhang·J. K. Dong·Y. Xu·J. Pan·L. P. He·L. J. Zhang·S. Y. Li
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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.

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J. Zhang, J. K. Dong, Y. Xu, J. Pan, L. P. He, L. J. Zhang, S. Y. Li. 2015-04-13. Superconductivity at 2.5 K in new transition-metal chalcogenide Ta2PdSe5. https://doi.org/10.1088/0953-2048%2F28%2F11%2F115015

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