Anomalous metallic ground state in BaV13O18
Anomalous metallic ground state in BaV13O18
复制标题
BaV13O18 中的异常金属基态
DOI：
10.1103/physrevb.89.140401
复制
发表时间：
2014
影响因子：
3.7
通讯作者：
T. Katsufuji
中科院分区：
文献类型：
--
作者：
T. Kanzaki;J. Fujioka;Y. Tokura;H. Kuwahara;T. Katsufuji
我们研究了，其中平均价态为+2.62()的V离子形成准面心立方晶格。我们发现，化学计量比晶体的基态是绝缘态，而非化学计量比晶体的基态是有效质量较大的金属晶体。这种金属状态可以用孤立的V离子处的磁矩与V四聚体中巡回载流子之间的近藤耦合来解释。
We studied single crystals of, in which V ions with an average valence of +2.62 () form a quasi-fcc lattice. We found that the ground state of the stoichiometric crystal is insulating, whereas that of the off-stoichiometric crystal is metallic with a large effective mass. This metallic state can be explained by the Kondo coupling between the magnetic moment existing at the lone V ion and itinerant carriers in the V tetramers.