期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 492, 期 -, 页码 27-32出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2018.04.011
关键词
Ab initio; Reverse monte carlo; Inverse modeling; Amorphous silicon; Phonons; Specific heat
资金
- NSF [DMR 1506836, DMR 1507118, DMR 1507166, DMR 1507670]
- Condensed Matter and Surface Science (CMSS) at Ohio University
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1507670] Funding Source: National Science Foundation
Amorphous silicon (a-Si) models are analyzed for structural, electronic and vibrational characteristics. Several models of various sizes have been computationally fabricated for this analysis. It is shown that a recently developed structural modeling algorithm known as force-enhanced atomic refinement (FEAR) provides results in agreement with experimental neutron and X-ray diffraction data while producing a total energy below conventional schemes. We also show that a large model ( similar to 500 atoms) and a complete basis is necessary to properly describe vibrational and thermal properties. We compute the density for a-Si, and compare with experimental results.
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