s-wave superconductivity in barium-doped phenanthrene as revealed by specific-heat measurements
Jianjun Ying, Xiangfeng Wang, Yajun Yan, Ziji Xiang, Xigang Luo, Zhe Sun, Xianhui Chen
DOI 10.1103/PhysRevB.85.180511 · Physical Review B
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Abstract
We report specific-heat studies on high-quality Ba-doped phenanthrene, one of the organic superconductors with fused benzene rings, with 100% shielding fraction. The specific-heat data indicate that Ba-doped phenanthrene is a single-gap s-wave superconductor with moderate coupling, and this sets constraints on theoretical models for the understanding of superconductivity in these hydrocarbon superconductors.
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