Optical properties of the high-pressure phases of SnO(2): first-principles calculation.
We present a detailed investigation on the optical properties, including dielectric function, reflectivity, absorption, refractive index, and electron energy-loss spectrum, of the high-pressure phase SnO(2) in the rutile, pyrite, fluorite, and cotunnite structures by using the density functional theory (DFT) plane-wave pseudopotential method. The results indicate that with the increasing of pressure the band gaps become larger, the density of states are broader, so the curves of optical properties have a little blue shift. Except that the fluorite phase has some metallic properties, the other three phases exhibit excellent dielectric behavior. Interestingly, the fluorite and cotunnite SnO(2) phases always have some special characteristics, such as higher plasma frequency, which need further fundamental and application research.
Li
Yanlu
Y
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
Fan
Weiliu
W
Sun
Honggang
H
Cheng
Xiufeng
X
Li
Pan
P
Zhao
Xian
X
Hao
Jingcheng
J
Jiang
Minhua
M