铋
卤化物
化学
超导电性
硫黄
氯
格子(音乐)
平面的
晶体结构
晶格常数
半导体
无机化学
凝聚态物理
结晶学
有机化学
光电子学
光学
衍射
材料科学
物理
计算机图形学(图像)
计算机科学
声学
作者
Bin-Bin Ruan,Kun Zhao,Qing-Ge Mu,Bin Pan,Tong Liu,H. X. Yang,Jianqi Li,Genfu Chen,Zhi-An Ren
摘要
A quaternary compound Bi3O2S2Cl, which consists of novel [BiS2Cl]2– layers, is reported. It adopts a layered structure of the space group I4/mmm (No. 139) with lattice parameters: a = 3.927(1) Å, c = 21.720(5) Å. In this compound, bismuth and chlorine atoms form an infinite planar layer, which is unique among the bismuth halides. Superconductivity is observed in both polycrystals and single crystals, and is significantly enhanced in the samples prepared with less sulfur or at higher temperatures. By tuning the content of sulfur, Bi3O2S2Cl can be converted from a semiconductor into a superconductor. The superconducting critical temperature ranges from 2.6 to 3.5 K. Our discovery of the [BiS2Cl]2– layer opens another door in searching for the bismuth compounds with novel physical properties.
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