Effect of pressure on transport properties of CeIrIn5
Effect of pressure on transport properties of CeIrIn5
复制标题
DOI：
10.1088/1742-6596/273/1/012058
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Y. Takaesu;N. Aso;Y. Tamaki;M. Hedo;T. Nakama;K. Uchima;Y. Ishikawa;K. Deguchi;N. Sato
中科院分区：
文献类型：
--
作者：
Y. Takaesu;N. Aso;Y. Tamaki;M. Hedo;T. Nakama;K. Uchima;Y. Ishikawa;K. Deguchi;N. Sato
测量了重费米子超导体CeIrIn_5在2.0 ~ 300 K温度范围内、流体静压至2.2GPa压力下的电阻率ρ和热电功率S。热电势S在90 μV/K以下有很大的正值，这是重费米子系统的特征。S的温度依赖性也显示出一个尖锐的最大值，其最大温度Ts，max随压力而增加，而其最大值是恒定的，与压力无关。这些实验结果有力地表明，CeIrIn 5的近藤温度通过施加压力而升高。
Electrical resistivity ρ and thermoelectric power S of a heavy-fermion superconductor CeIrIn5 have been measured at temperatures from 2.0 K to 300 K under hydrostatic pressures up to 2.2 GPa. The thermoelectric power S exhibits a large positive value up to 90 μV/K, which is characteristic of heavy-fermion systems. S also shows a sharp maximum in its temperature dependence and its maximum temperature Ts, max increases with pressure, while its maximum value is constant independent of pressure. These experimental results strongly indicate that the Kondo temperature of CeIrIn5 increases by applying the pressure.