Normal and Superconducting Properties of Noncentrosymmetric Heavy Fermion CeRhSi3
Normal and Superconducting Properties of Noncentrosymmetric Heavy Fermion CeRhSi3
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DOI：
10.1143/jpsj.76.051010
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发表时间：
2007-05
影响因子：
1.7
通讯作者：
N. Kimura;Yuji Muro;H. Aoki
中科院分区：
文献类型：
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作者：
N. Kimura;Yuji Muro;H. Aoki
研究了非中心对称重费米子cerhsi3的正常和超导性质。在正常状态下，CeRhSi 3在低温（常温1.6 K）下表现出反铁磁有序，但其近道温度远高于有序温度tn。施加压力P时，tn先增大后减小。超导性产生于反铁磁跃迁发生的压力处。随着压力的进一步施加，tn似乎不会降至零，而是几乎保持不变，然后tn比P与超导转变温度在26 kbar时的tc比P合并，此时tc达到最大值。在26 kbar以下观察到与超导性相关的近乎完美的磁屏蔽，表明在T N以下实现了整体超导性。我们观察到在温度以下电阻率和交流磁化率都有异常。这两种异常现象的起源似乎是相同的，但并不是……
We review the normal and superconducting properties in the noncentrosymmetric heavy-fermion CeRhSi 3 . In the normal state, CeRhSi 3 exhibits the antiferromagnetic order at low temperatures (1.6 K at ambient pressure) although its Kondo temperature is much higher than the ordering temperature T N . With applying pressure P , T N initially increases and subsequently decreases. The superconductivity arises at the pressures where the antiferromagnetic transition occurs. T N does not seem to fall to zero but becomes nearly constant with further application of pressure, and then T N vs P merges with the superconducting transition temperature T c vs P at 26 kbar where T c reaches the maximum. Nearly perfect magnetic-shielding associated with the superconductivity is observed below 26 kbar, suggesting that the bulk superconductivity is realized below T N . We observe an anomaly below T c in the resistivity as well as in the ac-susceptibility. The origin of the both anomalies seem to be the same but have not been...