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本帖最后由 Gaodamang 于 2019-9-1 20:34 编辑
刚开始学习晶体计算,尝试用Castep计算了ZnSe晶体的三个激发态。发现输出文件中给出的是跃迁偶极(Transition Dipoles),xyz每个方向上各用两个坐标表示。想知道如何通过它计算得到跃迁偶极矩(transition dipole moments)。此外,想还问下这个跃迁偶极矩是不是和Gaussian中跃迁电偶极矩含义相同。谢谢!
以下为输出文件全文,跃迁偶极在最后几行:
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BEGIN header
CASTEP generated TDDFT output
Highest occupied band for spin channel 1 36
Highest occupied band for spin channel 2 36
Energies in eV
Unit cell vectors (A)
5.667600 0.000000 0.000000
0.000000 5.667600 0.000000
0.000000 0.000000 5.667600
Fractional Co-ordinates
Zn 1 0.375000 0.375000 0.375000
Zn 2 0.375000 0.875000 0.875000
Zn 3 0.875000 0.375000 0.875000
Zn 4 0.875000 0.875000 0.375000
Se 5 0.625000 0.625000 0.625000
Se 6 0.125000 0.125000 0.625000
Se 7 0.125000 0.625000 0.125000
Se 8 0.625000 0.125000 0.125000
END header
BEGIN Characterisation of states as Kohn-Sham bands
State Occ. Unocc. Overlap
1 34 --> 37 0.064627
1 35 --> 37 0.135798
1 36 --> 37 0.795843
Total overlap for state 1 = 0.996944
2 34 --> 37 0.011845
2 35 --> 37 0.857809
2 36 --> 37 0.126616
Total overlap for state 2 = 0.996943
3 34 --> 37 0.919793
3 35 --> 37 0.002663
3 36 --> 37 0.073807
Total overlap for state 3 = 0.996921
END Characterisation of states as Kohn-Sham bands
BEGIN TDDFT Spectroscopic Data
State Excitation Energy Characterisation Converged Transition Dipoles (x,y,z)
1 1.6797501199010165E+000 Singlet Yes ( -4.5804414914393377E+000 1.6873525863268257E-001) ( -5.8843264423757891E+000 5.2367231473744902E-001) ( -3.9669887641344177E+000 -4.5276620016265490E-001)
2 1.6798607800377594E+000 Singlet Yes ( -2.3299227549316965E+000 -5.3285262956145578E+000) ( 3.1237526364125672E+000 4.8947233508385466E+000) ( -1.3442371128176593E+000 -1.5752640282059147E+000)
3 1.6799038645247604E+000 unknown No ( 1.1915041949385323E+000 3.9474427440141704E+000) ( 1.3339381291123626E+000 1.2002546942016119E+000) ( -2.2490977016453124E+000 -6.8221446582219185E+000)
END TDDFT Spectroscopic Data
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