Huge Upper Critical Field and Electronic Instability in Pressure-induced Superconductor CeIrSi3 without Inversion Symmetry in the Crystal Structure
Huge Upper Critical Field and Electronic Instability in Pressure-induced Superconductor CeIrSi3 without Inversion Symmetry in the Crystal Structure
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DOI：
10.1143/jpsj.77.073705
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发表时间：
2008-06
影响因子：
1.7
通讯作者：
R. Settai;Y. Miyauchi;T. Takeuchi;Florence Lévy;I. Sheikin;Y. Ōnuki
中科院分区：
文献类型：
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作者：
R. Settai;Y. Miyauchi;T. Takeuchi;Florence Lévy;I. Sheikin;Y. Ōnuki
我们测量了在磁场中的低温电阻率随压力的变化，并研究了具有非中心对称四极结构的CeIrSi 3的超导性质。CeIrSi 3是一种反铁磁体，在常压下Neel温度TN = 5.0K，但在压力Pc = 2.25GPa时反铁磁有序完全消失。超导电性出现在1.8 ~ 3.5GPa的宽压力范围内，最大转变温度Tsc为1.6K，Pc为2.63GPa。在Pc * 附近，磁场H沿[0 0 1]方向沿着的上临界场Hc 2没有被基于塞曼耦合的自旋极化破坏，而是具有小于1 K的上弯曲率，表明Hc 2在Pc * 处有发散趋势，Hc 2（0）约为450 kOe.另一方面，Hc 2 [1 1 0]的上临界场表明了泡利顺磁抑制的趋势，在2.65 GPa下Hc 2（0）= 95 kOe.这可能是一种电...
We measured low-temperature electrical resistivity in a magnetic field as a function of pressure, and studied the superconducting property of CeIrSi 3 with a non-centrosymmetric tetragonal structure. CeIrSi 3 is an antiferromagnet with a Neel temperature T N = 5.0 K at ambient pressure, but the antiferromagnetic ordering disappears completely at a pressure P c = 2.25 GPa. Superconductivity appears in a wide pressure region from 1.8 to about 3.5 GPa, with a maximum transition temperature T sc ≃1.6 K at P c * ≃2.63 GPa. At around P c * , the upper critical field H c2 for the magnetic field H along the [0 0 1] direction is not destroyed by spin polarization based on Zeeman coupling but possesses an upturn curvature below 1 K, revealing a divergent tendency of H c2 at P c * , with a huge H c2 (0)≃450 kOe. On the other hand, the upper critical field for H ∥[1 1 0] indicates the tendency of Pauli paramagnetic suppression, with H c2 (0) = 95 kOe at 2.65 GPa. This might be a combined phenomenon between the electr...