GeP
GeP is a thermodynamically stable semiconducting compound formed from germanium and phosphorus.
About GeP
GeP is a binary semiconducting material composed of germanium and phosphorus. As a thermodynamically stable phase residing on the convex hull, it represents a robust crystalline arrangement that is highly favored under standard conditions.
Its electronic character makes it a subject of significant interest for researchers investigating new semiconductor architectures. With a substantial number of reported structures across various databases, it serves as a key reference point for understanding the phase space of germanium-phosphorus systems.
Key Properties
Cross-validated computational properties for GeP, aggregated across 5 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of GeP. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for GeP, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| — | — | 0.67 | 0.0000 | -0.119 | — |
| C2/m (No. 12) | monoclinic | 0.49 | 0.0000 | -11.447 | 3.81 |
| I4mm (No. 107) | tetragonal | 0.00 | 0.0504 | 0.043 | — |
| — | — | 0.00 | 0.0529 | -0.066 | — |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0996 | 0.092 | — |
| I4mm (No. 107) | tetragonal | 0.00 | 0.1060 | -11.341 | 4.82 |
| — | — | 0.00 | 0.1077 | -0.011 | — |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.1870 | 0.179 | — |
| — | — | 0.00 | 0.1912 | 0.072 | — |
| Pm (No. 6) | monoclinic | 0.00 | 0.2001 | 0.193 | — |
| F-43m (No. 216) | cubic | 0.00 | 0.2659 | -11.181 | 3.67 |
| — | — | 0.00 | 0.2729 | 0.154 | — |
Synthesis Routes
Literature-extracted synthesis procedures targeting GeP.
Applications
Where GeP is used.
Frequently Asked Questions
Common questions about GeP, answered from cross-validated data.
What is GeP?
GeP is a thermodynamically stable semiconducting compound formed from germanium and phosphorus.
What is GeP used for?
What is the band gap of GeP?
Is GeP a metal, semiconductor, or insulator?
Is GeP thermodynamically stable?
What is the crystal structure of GeP?
How many polymorphs of GeP are known?
How is GeP synthesized?
What elements does GeP contain?
Where does the data for GeP come from?
How It Compares
As a standalone compound in this context, GeP serves as a fundamental archetype for binary germanium-phosphorus materials, demonstrating the structural diversity possible within this specific chemical system.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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