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- W2404760249 abstract "We present a dynamical approach to generate defect-free continuous-random-network (CRN) models of hydrogenated amorphous silicon ($a$-Si:H). Using the atomic coordination number of silicon as a collective variable and few configurational constraints, we have shown that classical metadynamics can be used to construct CRN models of $a$-Si with arbitrary concentrations of dangling-bond coordination defects. These defective networks have been subsequently hydrogenated to produce high-quality models of $a$-Si:H using ab initio total-energy calculations to generate hydrogen (H) microstructures for H concentrations from 7 to 22 at. %. The structural, electronic, optical, and vibrational properties of the models are examined, and the microstructure of the hydrogen distribution is analyzed and compared with experimental data from neutron scattering, spectroscopic ellipsometry, infrared spectroscopy, and nuclear magnetic resonance studies. The results obtained from the models are found to be in excellent agreement with the experimental data." @default.
- W2404760249 created "2016-06-24" @default.
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- W2404760249 date "2016-05-25" @default.
- W2404760249 modified "2023-10-09" @default.
- W2404760249 title "Metadynamical approach to the generation of amorphous structures: The case of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>a</mml:mi></mml:math>-Si:H" @default.
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- W2404760249 doi "https://doi.org/10.1103/physrevb.93.184202" @default.
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