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arXiv 1206.3758cond-mat.supr-con
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压力下非中心对称YPtBi的超导电性

Superconductivity in non-centrosymmetric YPtBi under pressure

T. V. Bay, T. Naka, Y. K. Huang, A. de Visser

摘要:

本文报道了非中心对称超导体YPtBi($T_c = 0.77$ K)的高压单晶研究。磁输运测量显示出弱的金属行为与载流子浓度$n \simeq 2.2 \times 10^{19}$ cm $^{-3}$。高至$p = 2.51$ GPa的电阻率测量结果表明压力促进了超导性。降低的上临界场$B_{c2}(T)$曲线塌陷到一条曲线上,其值超过了自旋单重态超导性的模型值。根据对非中心对称超导体的预测,$B_{c2}$数据指向超导序参量中的奇宇称分量。

英文摘要:

We report a high-pressure single-crystal study of the non-centrosymmetric superconductor YPtBi ($T_c = 0.77$ K). Magnetotransport measurements show a weak metallic behavior with a carrier concentration $n \simeq 2.2 \times 10^{19}$ cm$^{-3}$. Resistivity measurements up to $p = 2.51$ GPa reveal superconductivity is promoted by pressure. The reduced upper critical field $B_{c2}(T)$ curves collapse onto a single curve, with values that exceed the model values for spin-singlet superconductivity. The $B_{c2}$ data point to an odd-parity component in the superconducting order parameter, in accordance with predictions for non-centrosymmetric superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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