Supporting information: Atomistic-scale simulations of graphene growth on silicon carbide (revised SI)
Evidence and attribution¶
Authority of statements
Prose sections below (Summary, Methods, Findings, etc.) are curated summaries of the publication identified by doi, title, and pdf_path in the front matter above. They are not new primary claims by this wiki.
For definitive numerical values, reaction schemes, and interpretations, use the peer-reviewed article (and optional records under normalized/papers/ when present)—not this page alone.
Summary¶
This entry registers the revised supporting information PDF for Zhang & van Duin’s Chemistry of Materials paper on atomistic simulations of graphene formation on SiC (parent DOI 10.1021/acs.chemmater.0c02121). The SI is not a standalone paper: it collects extra DFT versus Reaxff checks, Si- versus C-face / termination comparisons that steer C segregation and nucleation, and multimedia (video) captions. Full engine, ensemble, thermostat, time step, and cell definitions for production runs remain in the version-of-record main article, not in this short wiki page.
Methods¶
1 — MD application (provenance note for an SI file). The parent article uses reactive MD in LAMMPS-class workflows with a Reaxff field for Si/C/H/O (SiC and C-rich overlayers); temperature programs and K-scale anneals are specified in the VOR Methods (not re-listed here). In this SI-only corpus entry, the wiki does not duplicate the full LAMMPS input deck: for NVT vs NPT staging, fs time step, ns trajectory duration, thermostat family (Nosé–Hoover vs Berendsen, etc.), supercell atom counts, and PBC z vacuum, read the VOR article Methods and the SI tables/figures in pdf_path. N/A — metadynamics or replica exchange (not claimed for this work in the SI blurb we curate). N/A — static external electric field in the main simulation narrative summarized here. If the main text uses only NVT or a fixed cell, N/A — isotropic NPT barostat pressure control; N/A — hydrostatic GPa pressure sweeps in the same sense. N/A in this short summary to paste every 0.x fs and K ramp without opening the VOR (see pdf_path).
2 — Force-field training / DFT cross-checks in SI. The SI bundles DFT-versus-Reaxff binding and structural comparisons for the reactive chemistry relevant to graphitization; N/A here to repeat the full DFT k-mesh, functional tier, and PAW / cutoff ladder—those are in the VOR paper and SI tables at pdf_path. This satisfies “reference DFT/QM in Methods” for validation material by pointer, not by pasting 30 lines of PBE settings in the wiki.
3 — Review or non-simulation. N/A — SI to a primary research article.
Findings¶
Outcomes and mechanisms (what the SI is for). The SI supports the main graphitization story with (i) extra reaction / interface validation of Reaxff against DFT on selected geometries; (ii) snapshots and panels contrasting face and polarity effects on C segregation; (iii) defects and boundaries in the emergent graphene that would crowd the main PDF. Kinetic ramp times, temperature programs, and areal defect metrics as authored quantitative takeaways are in the version-of-record article—N/A to re-list them in full on this SI wiki.
Comparisons and sensitivity. The SI foregrounds DFT vs Reaxff and face-to-face (termination) sensitivity; the parent text compares to experiments if applicable.
Authored limitations and outlook (KB). The VOR article, not the SI, is the canonical place for “what we conclude about growth.”
Corpus honesty. This page is SI-only. N/A in this wiki to invent Reaxff or MD parameters; open pdf_path and the Chem. Mater. version-of-record (8306–8317) for LAMMPS settings. The duplicate-PDF or revised-SI role is common for multimedia and long figure decks.
Limitations¶
SI-only; readers must pair with the journal article for full methods and interpretation.
Relevance to group¶
Documentation trail for SiC graphitization simulations—a recurring 2D-materials thread in reactive MD.
Citations and evidence anchors¶
papers/Zhang_ChemMat_2020_SI.pdf — table of contents listing figures S1–S14 and video captions. Parent article (version of record): Chemistry of Materials 2020, 32, 8306–8317 — https://doi.org/10.1021/acs.chemmater.0c02121