Metal–insulator transition in sodium tungsten bronzes, NaxWO3, studied by angle-resolved photoemission spectroscopy
Metal–insulator transition in sodium tungsten bronzes, NaxWO3, studied by angle-resolved photoemission spectroscopy
复制标题
DOI：
10.1016/j.jmmm.2006.10.1077
复制
发表时间：
2007-03
影响因子：
2.7
通讯作者：
S. Raj;D. Hashimoto;H. Matsui;S. Souma;Takafumi Sato;Takashi Takahashi;S. Ray;A. Chakraborty;D. Sarma;P. Mahadevan;S. Oishi;W. Mccarroll;M. Greenblatt
中科院分区：
文献类型：
--
作者：
S. Raj;D. Hashimoto;H. Matsui;S. Souma;Takafumi Sato;Takashi Takahashi;S. Ray;A. Chakraborty;D. Sarma;P. Mahadevan;S. Oishi;W. Mccarroll;M. Greenblatt
我们报告高分辨率角分辨光电子能谱钠钨青铜，NaxWO 3，表现出金属-绝缘体转变作为x的函数。我们发现，由于Na+离子在WO 3晶格中的随机分布引起的强烈无序，使系统绝缘，近EF态局域在NaxWO 3（x ≤ 0.25）中.在金属区，我们发现能带结构的刚性移动可以解释金属NaxWO 3带结构相对于Na掺杂。
We report high-resolution angle-resolved photoemission spectroscopy on sodium tungsten bronzes, NaxWO3, which exhibit a metal–insulator transition as a function of x. We found that the near-EFstates are localized in NaxWO3(x⩽0.25) due to the strong disorder caused by the random distribution of Na+ions in the WO3lattice, which makes the system insulating. In the metallic regime we found that the rigid shift of band structure can explain the metallic NaxWO3band structure with respect to Na doping.