顺磁性
电介质
反铁磁性
材料科学
兴奋剂
掺杂剂
物理
凝聚态物理
核磁共振
量子力学
作者
Yongchang Ma,Ang Li,Yajun Li,Li Du,Chenguang Zhang
出处
期刊:Physical review
日期:2023-02-09
卷期号:107 (7)
标识
DOI:10.1103/physrevb.107.075125
摘要
The dielectric properties of the various insulating phases in pure ${\mathrm{V}}_{2}{\mathrm{O}}_{3}$ and ${({\mathrm{V}}_{0.989}{\mathrm{Cr}}_{0.011})}_{2}{\mathrm{O}}_{3}$ crystals have been investigated. Large dielectric constants on the scale of ${10}^{3}$ were obtained, which were attributed to the backflow effect of normal carriers and also the periodic charge configuration relevant to V-V dimers in an antiferromagnetic insulating state or the bond contraction of V-Cr-V in a paramagnetic insulating phase. We propose that if Cr dopants are arranged nearly uniformly, the charge density of ${({\mathrm{V}}_{0.989}{\mathrm{Cr}}_{0.011})}_{2}{\mathrm{O}}_{3}$ in the paramagnetic insulating phase will exhibit a doping-induced wavelike distribution in real space, and thus the polarization of the system will be enhanced.
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