Superconductivity in Ca0.5La0.5FBiSe2
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- 作者：Jianming Zhan ; Lin Li ; Tingting Wang…
- 关键词：Superconductivity ; BiS2 ; based superconductors ; Hall effect
- 刊名：Journal of Superconductivity and Novel Magnetism
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：30
- 期：2
- 页码：305-309
- 全文大小：
- 刊物类别：Physics and Astronomy
- 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1557-1947
- 卷排序：30
文摘
Through the measurement of resistivity, magnetic susceptibility, and Hall effect, we discovered a novel BiSe2-based superconductor Ca0.5La0.5FBiSe2 with Tc of 3.9 K. A strong diamagnetic signal below Tc in susceptibility χ(T) is observed indicating the bulk superconductivity. The negative Hall coefficient throughout the whole temperature regime implies the dominant electron-type carriers in the sample. Different to most of BiS2-based compounds where superconductivity develops from a semiconducting-like normal state, its resistivity in the present compound exhibits a metallic behavior down to Tc. Together with the enhanced Tc, the metallic character of the normal state implies that the electronic structure of Ca0.5La0.5FBiSe2 may be different to those in the other BiS2-based compounds.