Single-crystal growth and superconductivity in RbNi2Se2
Single-crystal growth and superconductivity in RbNi2Se2
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RbNi2Se2 的单晶生长和超导性
DOI：
10.1103/physrevb.106.094511
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发表时间：
2022
影响因子：
3.7
通讯作者：
Wang Meng
中科院分区：
文献类型：
--
作者：
Liu Hui;Hu Xunwu;Guo Hanjie;Teng Xiao-Kun;Bu Huanpeng;Luo Zhihui;Li Lisi;Liu Zengjia;Huo Mengwu;Liang Feixiang;Sun Hualei;Shen Bing;Dai Pengcheng;Birgeneau R. J.;Yao Dao-Xin;Yi Ming;Wang Meng
我们报告的合成和表征，类似的铁硫系超导体，通过运输，角分辨光电子能谱，和密度泛函理论计算。一个超导转变atK被确定。在正常状态下，表现出顺磁性和费米液体行为。大的索末菲系数产生的有效电子质量为。在超导态下，零场电子比热数据可以用双能隙BCS模型描述，表明这是一种可能的多能隙超导体。我们的密度泛函理论计算和角分辨光电子能谱测量表明thatexhibits相对较弱的相关性和多带特性，符合多能隙超导。
We report the synthesis and characterization of, an analog of the iron chalcogenide superconductor, via transport, angle-resolved photoemission spectroscopy, and density functional theory calculations. A superconducting transition atK is identified. In the normal state,shows paramagnetic and Fermi-liquid behaviors. A large Sommerfeld coefficient yields an effective electron mass of. In the superconducting state, zero-field electronic specific-heat datacan be described by a two-gap BCS model, indicating thatis a possible multigap superconductor. Our density functional theory calculations and angle-resolved photoemission spectroscopy measurements demonstrate thatexhibits relatively weak correlations and multiband characteristics, consistent with the multigap superconductivity.