Characterization of material parameters of La0.33Pr0.34Ca0.33MnO3 thin film by terahertz time-domain spectroscopy
Characterization of material parameters of La0.33Pr0.34Ca0.33MnO3 thin film by terahertz time-domain spectroscopy
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太赫兹时域光谱表征La0.33Pr0.34Ca0.33MnO3薄膜材料参数
DOI:
10.7567/jjap.55.031101
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发表时间:
2016-01
影响因子:
1.5
通讯作者:
Xu, Wen
中科院分区:
文献类型:
--
作者:
Pi, Li;Mei, Hongying;Zhang, Peng;Xu, Wen
We present a systemic study of the terahertz (THz) optical conductivity of a strongly correlated La0.33Pr0.34Ca0.33MnO3 (LPCMO) thin film on a LaAlO3 substrate. The measurements are carried out by THz time-domain spectroscopy in the temperature regime from 15 to 105 K. The frequency-dependent optical conductivity in the metallic phase region of the samples exhibits a non-Drude-like response. We find that below 105 K, both the real and imaginary parts of the complex conductivity can be reproduced by the Drude–Smith model. The important sample and material parameters of the LPCMO thin film (such as the persistence of velocity, the ratio of carrier density to effective mass, and electronic scattering time) can be determined by fitting experimental data. The results obtained agree with those obtained from four-probe electrical transport measurements.
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