Al3As
Al3As is a metallic and thermodynamically unstable aluminum-arsenic compound that belongs to the broader III-V material class.
About Al3As
Al3As is a metallic member of the III-V semiconductor family, a group typically known for their semiconducting properties. Unlike its more conventional counterparts, this specific stoichiometry exhibits metallic character and lacks a traditional band gap, placing it in a unique structural category.
Due to its position above the thermodynamic hull, Al3As is considered metastable or unstable under standard conditions. Its existence is primarily documented through extensive computational structural searches, which have identified numerous potential configurations for this aluminum-arsenic phase.
Key Properties
Cross-validated computational properties for Al3As, 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.
Applications
Where Al3As is used.
Frequently Asked Questions
Common questions about Al3As, answered from cross-validated data.
What is Al3As?
Al3As is a metallic and thermodynamically unstable aluminum-arsenic compound that belongs to the broader III-V material class.
What is Al3As used for?
What is the band gap of Al3As?
Is Al3As a metal, semiconductor, or insulator?
Is Al3As thermodynamically stable?
How many polymorphs of Al3As are known?
What elements does Al3As contain?
Where does the data for Al3As come from?
How It Compares
Within the iii-v semiconductors class.
While most III-V compounds like AlAs, AlN, and GaN are celebrated for their wide-gap semiconducting behavior and high stability, Al3As deviates significantly by displaying metallic electronic properties and reduced thermodynamic favorability.
Related Compounds
Other III-V Semiconductors in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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