Structural study on novel two-dimensional superconductor NaxHfNCl
Structural study on novel two-dimensional superconductor NaxHfNCl
复制标题
新型二维超导体NaxHfNCl的结构研究
DOI：
10.1016/s0022-3697(99)00155-9
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发表时间：
1999
影响因子：
4
通讯作者：
T. Kajitani
中科院分区：
文献类型：
--
作者：
S. Shamoto;K. Iizawa;M. Yamada;K. Ohoyama;Y. Yamaguchi;T. Kajitani
本文用粉末中子衍射方法测定了新型二维超导体NaxHfNCl（x=0.29，Tc= 20 K）的结构。NaxHfNCl与Li_（0.16）ZrNCl是类质同象的，后者也表现出超导性，Tc= 15 K。Li0.16ZrNCl中Hf-Hf的最近原子间距（4K时为3.24 μ m）比Zr-Zr的最近原子间距（4K时为3.10 μ m）大。这种结构变化对应于Hf系统中d带的转移积分的减小，即tHf/tZr = 0.85，表明NaxHfNCl中态密度的增强。
The structure of the novel two-dimensional superconductor, NaxHfNCl (x=0.29, Tc=20K) is determined by powder neutron diffraction measurement. NaxHfNCl is isomorphous to Li0.16ZrNCl, which also exhibits superconductivity with Tc=15K. The nearest interatomic distance of Hf–Hf (3.24Å at 4K) is longer than that of Zr–Zr (3.10Å at 4K) in Li0.16ZrNCl. This structural change corresponds to the decrease in the transfer integral of the d bands in the Hf system, i.e. tHf/tZr∼0.85, indicating the enhancement of the density of states in NaxHfNCl.
影响因子：
29.4
作者：
S. Yamanaka;H. Kawaji;K. Hotehama;M. Ohashi
通讯作者：
S. Yamanaka;H. Kawaji;K. Hotehama;M. Ohashi