Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study
Low-temperature specific heat (SH) is measured on the postannealed Ba(Fe1−xNix)2As2 single crystal with x = 0.058 under different magnetic fields. The sample locates on the overdoped sides and the critical transition temperature Tc is determined to be 14.8 K by both the magnetization and SH measurem...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/419017 |
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| author | Gang Mu Bo Gao Xiaoming Xie Yoichi Tanabe Jingtao Xu Jiazhen Wu Katsumi Tanigaki |
| author_facet | Gang Mu Bo Gao Xiaoming Xie Yoichi Tanabe Jingtao Xu Jiazhen Wu Katsumi Tanigaki |
| author_sort | Gang Mu |
| collection | DOAJ |
| description | Low-temperature specific heat (SH) is measured on the postannealed Ba(Fe1−xNix)2As2 single crystal with x = 0.058 under different magnetic fields. The sample locates on the overdoped sides and the critical transition temperature Tc is determined to be 14.8 K by both the magnetization and SH measurements. A simple and reliable analysis shows that, besides the phonon and normal electronic contributions, a clear T2 term emerges in the low temperature SH data. Our observation is similar to that observed in the Co-doped system in our previous work and is consistent with the theoretical prediction for a superconductor with line nodes in the energy gap. |
| format | Article |
| id | doaj-art-ea1df72938de404f93867a4c2b67d2a2 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-ea1df72938de404f93867a4c2b67d2a22025-02-03T05:48:08ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242015-01-01201510.1155/2015/419017419017Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat StudyGang Mu0Bo Gao1Xiaoming Xie2Yoichi Tanabe3Jingtao Xu4Jiazhen Wu5Katsumi Tanigaki6State Key Laboratory of Functional Materials for Informatics and Shanghai Center for Superconductivity, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics and Shanghai Center for Superconductivity, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics and Shanghai Center for Superconductivity, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaDepartment of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanWorld Premier International Research Center, Tohoku University, Sendai 980-8578, JapanDepartment of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanDepartment of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanLow-temperature specific heat (SH) is measured on the postannealed Ba(Fe1−xNix)2As2 single crystal with x = 0.058 under different magnetic fields. The sample locates on the overdoped sides and the critical transition temperature Tc is determined to be 14.8 K by both the magnetization and SH measurements. A simple and reliable analysis shows that, besides the phonon and normal electronic contributions, a clear T2 term emerges in the low temperature SH data. Our observation is similar to that observed in the Co-doped system in our previous work and is consistent with the theoretical prediction for a superconductor with line nodes in the energy gap.http://dx.doi.org/10.1155/2015/419017 |
| spellingShingle | Gang Mu Bo Gao Xiaoming Xie Yoichi Tanabe Jingtao Xu Jiazhen Wu Katsumi Tanigaki Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study Advances in Condensed Matter Physics |
| title | Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study |
| title_full | Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study |
| title_fullStr | Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study |
| title_full_unstemmed | Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study |
| title_short | Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe0.942Ni0.058)2As2: A Low-Temperature Specific-Heat Study |
| title_sort | gap structure of the overdoped iron pnictide superconductor ba fe0 942ni0 058 2as2 a low temperature specific heat study |
| url | http://dx.doi.org/10.1155/2015/419017 |
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