Pressure-induced superconductivity in the orthorhombic Kondo compound CePtSi2
Pressure-induced superconductivity in the orthorhombic Kondo compound CePtSi2
复制标题
斜方近藤化合物 CePtSi2 中的压力诱导超导性
DOI：
10.1103/physrevb.79.172507
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发表时间：
2009
影响因子：
3.7
通讯作者：
Y. Uwatoko
中科院分区：
文献类型：
--
作者：
T. Nakano;M. Ohashi;G. Oomi;K. Matsubayashi;Y. Uwatoko
通过测量近藤化合物的电阻率和磁阻，发现了一种由流体静压引起的超导电性。常压下的AF转变温度为1.8K，压力对AF转变温度有抑制作用，在1.2GPa附近消失。在1.4GPa以上，在1.4 ~ 2.4GPa之间出现超导相，在1.7GPa处出现最大值0.14K。超导的上临界场为0.7T，明显大于BCS理论预测的泡利极限。
We have discovered a member of superconductivity induced by hydrostatic pressure in an antiferromagnetic (AF) concentrated Kondo compoundby measuring the resistivity and magnetoresistance. The AF transition temperatureof 1.8 K at ambient pressure is suppressed by pressure and disappears around 1.2 GPa. Above 1.4 GPa, a superconducting phase appears between 1.4 and 2.4 GPa, with the maximumof 0.14 K at 1.7 GPa. The upper critical field of the superconductivity is evaluated to be 0.7 T, which is clearly larger than that of the Pauli limit predicted by the BCS theory.