Dimerization and Charge Order in Hollandite K2V8O16
Dimerization and Charge Order in Hollandite K2V8O16
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Hollandite K2V8O16 中的二聚和电荷顺序
DOI：
10.1103/physrevlett.107.027201
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发表时间：
2011
影响因子：
8.6
通讯作者：
A. C. Komarek
中科院分区：
文献类型：
--
作者：
J. Mizuki;K. Ishii et al.,;A. C. Komarek
通过中子和x射线衍射以及热力学和电子自旋共振测量，研究了荷兰石中的金属-绝缘体跃迁。对扭曲相晶体结构的完整分析使我们能够确定二聚化是绝缘中的主要扭曲因素。在低温下，一半的V链完全二聚，解释了自旋单重态的形成对磁化率的抑制。二聚化过程伴随着电荷分离成链。
The metal-insulator transition occurring in hollanditehas been studied by means of neutron and x-ray diffraction as well as by thermodynamic and electron-spin resonance measurements. The complete analysis of the crystal structure in the distorted phase allows us to identify dimerization as the main distortion element in insulating. At low-temperature, half of the V chains are dimerized perfectly explaining the suppression of magnetic susceptibility due to the formation of spin singlets. The dimerization is accompanied by the segregation of charges into chains.