Specific Heat on the Non-centrosymmetric Superconductor LaPt3Si

被引:5
|
作者
Shiotsuki, Masahiro [1 ]
Motoyama, Gaku [1 ]
Oda, Yasukage [1 ]
Yamaguchi, Akira [1 ]
Sumiyama, Akihiko [1 ]
Takeuchi, Tetsuya [2 ]
Settai, Rikio [3 ]
Onuki, Yoshichika [3 ]
机构
[1] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
[2] Osaka Univ, Low Temp Ctr, Toyonaka, Osaka 5600043, Japan
[3] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan
关键词
superconductivity; non-centrosymmetric structure; specific heat; LaPt3Si;
D O I
10.1143/JPSJS.80SA.SA070
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have measured specific heat of poly and single crystalline LaPt3Si samples under various magnetic fields. For zero magnetic field, we observed a distinct peak and jump in the specific heat at the super-conducting transition temperature T-c similar to 0.64 K and 0.61 K for the poly and single crystals, respectively. Temperature dependences of the specific heat of both samples below T-c can be well-described by a exponential equation for a conventional superconductor at zero magnetic field. The jump at T-c of single crystal is still distinct under magnetic fields. On the other hand, the peak of the poly crystal becomes broad above 40 Gauss. The broad additional specific heat tail appears at higher temperatures than the T-c expected from the results of the single crystal. We show, for the first time, the temperature dependence of superconducting critical magnetic field H-c(T) obtained from the specific heat measurement. Small anisotropy of H-c(T) was observed for the single crystal, with H-c,(0) = 66 and 61 Gauss for H//a and H//c, respectively.
引用
收藏
页数:3
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