Pressure-Induced Heavy-Fermion Superconductivity in Antiferromagnet CeIrSi3 without Inversion Symmetry
Pressure-Induced Heavy-Fermion Superconductivity in Antiferromagnet CeIrSi3 without Inversion Symmetry
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DOI：
10.1143/jpsj.75.043703
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发表时间：
2006-04
影响因子：
1.7
通讯作者：
I. Sugitani;Y. Okuda;H. Shishido;Tsutomu Yamada;A. Thamizhavel;E. Yamamoto;Tatsuma D. Matsuda;Y. Haga;T. Takeuchi;R. Settai;Y. Ōnuki
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文献类型：
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作者：
I. Sugitani;Y. Okuda;H. Shishido;Tsutomu Yamada;A. Thamizhavel;E. Yamamoto;Tatsuma D. Matsuda;Y. Haga;T. Takeuchi;R. Settai;Y. Ōnuki
我们报道了在反铁磁体CeIrSi3中发现的压致超导电性，它在四方晶体结构中缺乏反转对称性。在常压下，Neel温度TN=5.0K随压力的增加而单调下降，在2.5 GPa时变为零。超导电性在1.8~3.5 Gpa的宽压区内出现，超导转变温度Tsc=1.6K，2.5 GPa时较大的上临界场Hc2(0)=11.1T，表明具有重费米子超导电性。
We report the discovery of pressure-induced superconductivity in an antiferromagnet CeIrSi 3 , which lacks inversion symmetry in the tetragonal crystal structure. The Neel temperature T N = 5.0 K at ambient pressure decreases monotonically with increasing pressure, and becomes zero at about 2.5 GPa. Superconductivity appears in a wide pressure region from 1.8 GPa to about 3.5 GPa, with a relatively large superconduting transition temperature T sc = 1.6 K and a large upper critical field H c2 (0) = 11.1 T at 2.5 GPa, indicating heavy-fermion superconductivity.