Work is organized into discrete items so contributors can see what is still open and how rewards are distributed.
Goal: Discover novel 2D layered superconductors with Tc significantly above 5 K for TMD semiconductor chip integration via CVD-compatible synthesis.
Core hypothesis: Tc in layered superconductors scales with (1) electron-phonon coupling strength, (2) density of states at the Fermi level, and (3) specific phonon modes linked to layer breathing and shear. Novel ternary compositions in known layered structural families are the highest-probability path to ambient-condition Tc > 10 K.
GGen /ggen/scout with {X} template sweeps over three TMD-adjacent chemical spaces:
Scout | Template | Element group | Action ID |
|---|---|---|---|
1
|
chalcogens |
|
2 |
| transition_metals |
|
3 |
| chalcogens |
|
All scouts: hull cutoff ≤ 50 meV/atom, max 24 atoms/unit cell, layered crystal systems (trigonal, hexagonal, tetragonal).
Filter for hull distance ≤ 50 meV/atom, layered systems only
Geometry gates: space group check, c/a ratio, interlayer spacing ≥ 2.5 Å, vdW gap presence
Structural validation against known layered SC reference geometries
/ggen/export for validated candidates
DFT relaxation (Orb v3) of top 20 with P4/nmm/c/a/layer-gap validation gates
Phonon DOS calculation, electron-phonon coupling constant λ
McMillan/Allen-Dynes Tc prediction → ranked shortlist
CVD/MBE feasibility assessment for top 5 candidates
Precursor chemistry, growth temperature, substrate compatibility
Ranked candidate shortlist with Tc predictions, thermodynamic stability data, structural metrics, and synthesis recommendations.
Tc > 10 K — minimum viable for ambient research interest
Tc > 30 K — breakthrough threshold (matches MgB₂)
Hull distance ≤ 50 meV/atom — synthesizable by CVD/MBE
Interlayer spacing ≥ 2.5 Å — vdW gap for 2D exfoliation/stacking
NbSe₂: wafer-scale MOCVD growth, Tc = 5 K (bulk), ~3 K (monolayer)
MgB₂ (AlB₂-type P6/mmm): Tc = 39 K, highest ambient-Tc binary boride
Ba₁₋ₓKₓFe₂As₂ (ThCr₂Si₂-type I4/mmm): Tc = 38 K, iron-pnictide benchmark
3DSC Dataset — 1,887 superconductor families with predicted Tc
GGen Service — candidate generation routes
(structural validation, EPC benchmarking, screening pipeline) (GGen development, CVD synthesis, 2D materials)