论文标题
在高压下在斜塔塔al多氢气中观察到的超导性
Superconductivity Observed in Tantalum Polyhydride at High Pressure
论文作者
论文摘要
我们报告了触觉多氢气超导体的实验发现。使用钻石砧池与原位高压激光加热技术合成在高压和高温条件下合成。通过压力下的电阻测量研究了超导性。在样品中，在197 GPa的最高超导转变温度TC在与〜2000 K加热的相同压力下合成的样品中约为30 K。施加支持超导性质的磁场后，过渡将转移到低温。超导相的零温度μ0HC2（0）处的上临界场估计为〜20 t，对应于GL相干长度〜40埃40。我们的结果表明，TAH3的I-43D阶段可能会产生超导性。据我们的最佳知识，这是对过渡金属VB氢化物的实验实现。
We report experimental discovery of tantalum polyhydride superconductor. It was synthesized at high pressure and high temperature conditions using diamond anvil cell combined with in-situ high pressure laser heating techniques. The superconductivity was investigated via resistance measurements at pressures. The highest superconducting transition temperature Tc was found to be ~30 K at 197 GPa in the sample that was synthesized at the same pressure with ~2000 K heating. The transitions are shifted to low temperature upon applying magnetic fields that supports the superconductivity nature. The upper critical field at zero temperature μ0Hc2(0) of the superconducting phase is estimated to be ~20 T that corresponds to GL coherent length ~40 angstroms. Our results suggest that the superconductivity may arise from I-43d phase of TaH3. It is, for the first time to our best knowledge, experimental realization of superconducting hydrides for the VB group of transitional metals.
