准二维电荷密度波导体钾紫青铜K_xMo_6O_(17)单晶样品的制备

Crystal growth of quasi-two-dimensional purple bronze K_xMo_6O_(17)

采用碳酸盐替代高钼酸盐电解还原的方法成功制备出了准二维电荷密度波导体钾紫青铜单晶 .通过x射线衍射、透射电子显微术等方法对单晶进行结构分析表明 :晶胞参数a =b =0 5 5 4 0nm ,c =1 35 0 8nm ,单晶为三角晶系 ,对称群为P3- .电阻温度关系曲线的测量显示 :钾紫青铜KxMo6 O1 7单晶在

Purple bronze K xMo 6O 17 single crystals are successfully grown by electrolytic reduction method from the melts of K 2CO 3 and MoO 3.The detailed process of the preparation is reported.The structure of the single crystals are investigated with x-ray diffraction and Transmission electron microscope.The results show that the crystals have large sizes and high qualities.The unit cell parameters are:a=b=0.5540nm,c=1.3508nm,and the crystal structure is refined to be trigonal with space group P3-.The temperature dependence of resistance reveals that the compounds undergo Peierls phase transition at 112K.