Band Gap Energies and Refractive Indices of Epitaxial Pb1-xSrxTe Thin Films
Band Gap Energies and Refractive Indices of Epitaxial Pb1-xSrxTe Thin Films
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外延Pb1-xSrxTe薄膜的带隙能和折射率
DOI:
10.1088/0256-307x/25/9/064
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发表时间:
2008-09
影响因子:
3.5
通讯作者:
中科院分区:
文献类型:
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作者:
Pb1-xSrxTe thin films with different strontium (Sr) compositions are grown on BaF2(111) substrates by molecular beam epitaxy (MBE). Using high resolution x-ray diffraction (HRXRD), we obtain Pb1-xSrxTe lattice constants, which vary in the range 6.462-6.492A. According to the Vegard law and HRXRD data, Sr compositions in Pb1-xSrxTe thin films range from 0.0-8.0%. The Pb1-xSrxTe refractive index dispersions are attained from infrared transmission spectrum characterized by Fourier transform infrared (FTIR) transmission spectroscopy. It is found that refractive index decreases while Sr content increases in Pb1-xSrxTe. We also simulate the Pb1-xSrxTe transmission spectra theoretically to obtain the optical band gap energies which range between 0.320 eV and 0.449 eV. The simulated results are in good agreement with the FTIR data. Finally, we determine the relation between Pb1-xSrxTe band gap energies and Sr compositions (Eg = 0.320+0.510x-0.930x2 + 184x3 (eV)).
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影响因子:
3.7
作者:
通讯作者:
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影响因子:
4
作者:
R. Bartolo;W. Bewley;I. Vurgaftman;C. L. Felix;J. Meyer;M. Yang
通讯作者:
R. Bartolo;W. Bewley;I. Vurgaftman;C. L. Felix;J. Meyer;M. Yang
影响因子:
4
作者:
Zhisheng Shi;G. Xu;P. McCann;X. Fang;N. Dai;C. L. Felix;W. Bewley;I. Vurgaftman;J. Meyer
通讯作者:
Zhisheng Shi;G. Xu;P. McCann;X. Fang;N. Dai;C. L. Felix;W. Bewley;I. Vurgaftman;J. Meyer
影响因子:
3.2
作者:
A. Majumdar;H. Xu;F. Zhao;J. Keay;L. Jayasinghe;S. Khosravani;X. Lu;V. Kelkar;Z. Shi
通讯作者:
A. Majumdar;H. Xu;F. Zhao;J. Keay;L. Jayasinghe;S. Khosravani;X. Lu;V. Kelkar;Z. Shi
影响因子:
3.2
作者:
通讯作者:
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