Optical study on strongly correlated electron system LiV2O4
Optical study on strongly correlated electron system LiV2O4
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DOI：
10.1088/1742-6596/200/1/012068
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Irizawa;K. Shimai;T. Nanba;S. Niitaka;H. Takagi
中科院分区：
文献类型：
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作者：
A. Irizawa;K. Shimai;T. Nanba;S. Niitaka;H. Takagi
我们通过红外光谱显微镜分析了高压和低温下 LiV2O4 电子态的变化。光谱清楚地展示了从环境压力下的金属态到高压下的绝缘态的变化，新打开的能隙为2Δ~0.5 eV。电子能带结构的改变以特征声子的出现为特征。将 LiV2O4 在压力诱导绝缘状态下的吸收系数 a 与 AlV2O4 在温度诱导绝缘状态下的吸收系数进行了比较。
We investigate the change in the electronic states of LiV2O4 under high pressures and low temperatures analyzed by an infrared spectromicroscopy. The optical spectra clearly exhibit the change from a metallic state under ambient pressure to an insulating state under high pressures with a newly opened gap of 2Δ ~ 0.5 eV. The modification in the electronic band structure is featured by the appearance of a characteristic phonon. The absorption coefficient a of LiV2O4 in the pressure-induced insulating state is compared to that of AlV2O4 in the temperature-induced one.