Thermal Conductivity Measurements of Caged Structural Superconductors
Thermal Conductivity Measurements of Caged Structural Superconductors
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DOI：
10.1016/j.phpro.2016.04.025
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
H. Matsuzaki;K. Hida;N. Kase;T. Nakano;N. Takeda
中科院分区：
文献类型：
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作者：
H. Matsuzaki;K. Hida;N. Kase;T. Nakano;N. Takeda
在磁场中测量Ca3Rh4Sn13和Sr3Ir4Sn13的热导率以揭示超导状态。根据磁化率 χ(T) 和电阻率 ρ(T) 测量，Ca3Rh4Sn13 和 Sr3Ir4Sn13 的超导转变温度 Tco 分别确定为 8 K 和 5 K。 Ca3Rh4Sn13的热导率κ(T)表明超导状态是无节点波，因为残余热导率κ0/Tin零磁场很小。另一方面，零磁场下Sr3Ir4Sn13的κ(T)表明超导具有节点间隙而不是全间隙。节点超导能隙是否存在仍有待澄清，因为达到的温度可能不足以讨论超导状态。
Thermal conductivity of Ca3Rh4Sn13and Sr3Ir4Sn13were measured in magnetic fields to reveal superconducting state. From magnetic susceptibilityχ(T) and electrical resistivityρ(T) measurements, superconducting transition temperatureTcof Ca3Rh4Sn13and Sr3Ir4Sn13is determined to be 8 and 5 K, respectively. Thermal conductivityκ(T) of Ca3Rh4Sn13indicates that superconducting state is nodelesss-wave, because residual thermal conductivityκ0/Tin zero magnetic field is very small. On the other hand,κ(T) of Sr3Ir4Sn13in zero magnetic field suggests that superconductivity possesses nodal gap rather than full gap. Whether nodal superconducting gap exists or not still remains to be clarified, because there is a possibility that the achieving temperature is insufficient to discuss superconducting state.