无机材料学报2020，Vol.35Issue(4)：505-510,后插1-后插2,8.DOI:10.15541/jim20190125
Pd插层NbSe2化合物的制备、晶体结构和电学性质研究
Synthesis, Crystal Structure, and Electrical Conductivity of Pd-intercalated NbSe2
摘要
Abstract
New intercalated compounds PdxNbSe2 (x=0-0.17) were synthesized via solid-state reaction. They pos-sess the parent structure of 2H-NbSe2 and crystalize in the hexagonal space group of P63/mmc. The intercalated Pd occupies the octahedral position in the van der Waals gaps of 2H-NbSe2. Unit cell parameter c increases linearly with the Pd content, while a is nearly unchanged. The lattice parameter of Pd0.17NbSe2 (a=b=0.34611(2) nm, c= 1.27004(11) nm) is identified by single crystal X-ray diffraction. The intercalated Pd stabilizes the crystal structure of NbSe2 by connecting the adjacent Nb-Se layers with [PdSe6] octahedra and leads to the enhanced thermostability in air. Temperature dependence of electric resistivity reveals that the residual resistivity ratio of PdxNbSe2 mono-tonically decreases with addition of the intercalated Pd content. The decreased superconducting critical temperature of PdxNbSe2 indicates the suppression effect of Pd intercalation on the superconductivity in the host NbSe2.关键词
PdxNbSe2/过渡金属硫族化合物/晶体结构/超导Key words
PdxNbSe2/transition metal dichalcogenide/crystal structure/superconducting分类
数理科学引用本文复制引用
黄冲,赵伟,王东,卜克军,王思顺,黄富强..Pd插层NbSe2化合物的制备、晶体结构和电学性质研究[J].无机材料学报,2020,35(4):505-510,后插1-后插2,8.基金项目
National Key Research and Development Program (2016YFB0901600) （2016YFB0901600）
Science and Technology Commission of Shanghai (16JC1401700,16ZR1440500) （16JC1401700,16ZR1440500）
National Natural Science Foundation of China (Y93GJ11101) （Y93GJ11101）
The Key Re-search Program of Chinese Academy of Sciences (QYZDJ-SSW-JSC013,KGZD-EW-T06) （QYZDJ-SSW-JSC013,KGZD-EW-T06）
CAS Center for Excellence in Superconducting Electronics, and Youth Innovation Promotion Association CAS （）
