Nodal superconductivity and superconducting dome in the layered superconductor Ta4Pd3Te16
Nodal superconductivity and superconducting dome in the layered superconductor Ta4Pd3Te16
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层状超导体 Ta4Pd3Te16 中的节点超导性和超导穹顶
DOI：
10.1103/physrevb.92.180505
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发表时间：
2015-11-09
影响因子：
3.7
通讯作者：
Li, S. Y.
中科院分区：
文献类型：
--
作者：
Pan, J.;Jiao, W. H.;Li, S. Y.
本文测量了一种具有准一维特性的层状超导体--三元碲化物Ta_4Pd_3 Te_（16）的低温热导率，其相变温度T_c约为4.3K。零磁场下热导率的显著剩余线性项及其对磁场的快速依赖性为超导能隙中存在节点提供了证据。通过测量压力下的电阻率，我们揭示了一个超导圆顶的温度-压力相图。间隙节点和超导圆顶的存在表明在Ta 4Pd 3 Te 16中具有非常规的超导性，这可能与这种低维化合物中的电荷密度波不稳定性有关。
We measured the low-temperature thermal conductivity of a layered superconductor with quasi-one-dimensional characteristics, the ternary telluride Ta4Pd3Te16 with a transition temperature T-c approximate to 4.3 K. The significant residual linear term of thermal conductivity in zero magnetic field and its rapid field dependence provide evidence for nodes in the superconducting gap. By measuring resistivity under pressure, we reveal a superconducting dome in the temperature-pressure phase diagram. The existence of gap nodes and a superconducting dome suggest unconventional superconductivity in Ta4Pd3Te16, which may relate to a charge-density-wave instability in this low-dimensional compound.