Unusual behaviours and impurity effects in the noncentrosymmetric superconductor CePt3Si
Unusual behaviours and impurity effects in the noncentrosymmetric superconductor CePt3Si
复制标题
非中心对称超导体 CePt3Si 的异常行为和杂质效应
DOI:
10.1088/1367-2630/11/5/055054
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发表时间:
2009
影响因子:
3.3
通讯作者:
Y. Ōnuki
中科院分区:
文献类型:
--
作者:
I. Bonalde;R. Ribeiro;W. Bramer;C. Rojas;E. Bauer;A. Prokofiev;Y. Haga;T. Yasuda;Y. Ōnuki
We report a study in which the effect of defects/impurities, growth process, off-stoichiometry and presence of impurity phases on the superconducting properties of noncentrosymmetric CePt3Si is analysed by means of the temperature dependence of the magnetic penetration depth. We found that the linear low-temperature response of the penetration depth—indicative of line nodes in this material—is robust regarding sample quality, in contrast to what is observed in unconventional centrosymmetric superconductors with line nodes. We discuss evidence suggesting that the broadness of the superconducting transition may be intrinsic, though not implying the existence of a second superconducting transition. The superconducting transition temperature systematically occurs at about 0.75 K in our measurements, in agreement with resistivity and ac magnetic susceptibility data but in conflict with specific heat, thermal conductivity and NMR data in which Tc is about 0.5 K. Random defects do not change the linear low-temperature dependence of the penetration depth in the heavy-fermion CePt3Si with line nodes, as they do in unconventional centrosymmetric superconductors with line nodes.
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DOI:
--
发表时间:
2011
期刊:
Journal of Physical Society of Japan
影响因子:
--
作者:
T.Sugawara;et al
通讯作者:
et al
影响因子:
1.7
作者:
Bauer, Ernst;Kaldarar, Heinich;Bonalde, Ismardo
通讯作者:
Bonalde, Ismardo
影响因子:
1.7
作者:
Takashi Yasuda;H. Shishido;T. Ueda;Shin Hashimoto;R. Settai;T. Takeuchi;Tatsuma D. Matsuda;Y. Haga;Y. Ōnuki
通讯作者:
Takashi Yasuda;H. Shishido;T. Ueda;Shin Hashimoto;R. Settai;T. Takeuchi;Tatsuma D. Matsuda;Y. Haga;Y. Ōnuki
DOI:
--
发表时间:
2006
期刊:
J. Phys. Soc. Jpn Vol.75
影响因子:
--
作者:
Keisuke;Nakatsuji
通讯作者:
Nakatsuji