Abstract
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 T c 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.
Original language | English |
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Article number | 419017 |
Journal | Advances in Condensed Matter Physics |
Volume | 2015 |
DOIs | |
Publication status | Published - 2015 |
ASJC Scopus subject areas
- Condensed Matter Physics