GaSb
Gallium antimonide · GaSb
Gallium antimonide is a stable III-V semiconductor material frequently utilized in the fabrication of infrared-sensitive optoelectronic devices.
About Gallium antimonide
Gallium antimonide is a thermodynamically stable member of the III-V semiconductor family, characterized by its metallic electronic nature. Its structural integrity is well-documented, supported by a vast array of reported crystal structures across multiple databases.
This material is highly valued in the development of advanced optoelectronic devices. Its unique electronic properties make it a critical component for high-speed infrared detectors and laser diodes, where it serves as a foundational substrate for complex epitaxial growth.
Key Properties
Cross-validated computational properties for Gallium antimonide, aggregated across 4 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 GaSb. 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 GaSb, 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. |
|---|---|---|---|---|---|
| F-43m (No. 216) | cubic | 0.00 | 0.0000 | -18.804 | 5.50 |
| P63mc (No. 186) | hexagonal | 0.00 | 0.0145 | -18.789 | 5.51 |
| I-4m2 (No. 119) | tetragonal | 0.00 | 0.1847 | -18.619 | 6.59 |
| Immm (No. 71) | orthorhombic | 0.00 | 0.1941 | -18.610 | 6.60 |
| P1 (No. 1) | triclinic | 0.00 | 0.2849 | -18.519 | 5.84 |
| P1 (No. 1) | triclinic | 0.00 | 0.2852 | -18.519 | 5.66 |
| P1 (No. 1) | triclinic | 0.00 | 0.2873 | -18.517 | 5.79 |
| P1 (No. 1) | triclinic | 0.00 | 0.3133 | -18.491 | 5.82 |
| P1 (No. 1) | triclinic | 0.00 | 0.3339 | -18.470 | 5.60 |
| F-43m (No. 216) | Cubic | — | — | — | 5.59 |
| C2/m (No. 12) | Monoclinic | — | — | — | 5.28 |
| No. 0 | unknown | — | — | — | 1.39 |
Applications
Where Gallium antimonide is used.
Frequently Asked Questions
Common questions about Gallium antimonide, answered from cross-validated data.
What is GaSb?
Gallium antimonide is a stable III-V semiconductor material frequently utilized in the fabrication of infrared-sensitive optoelectronic devices.
What is GaSb used for?
What is the band gap of GaSb?
Is GaSb a metal, semiconductor, or insulator?
Is GaSb thermodynamically stable?
What is the crystal structure of GaSb?
What is the density of GaSb?
How many polymorphs of GaSb are known?
What elements does GaSb contain?
Where does the data for GaSb come from?
How It Compares
Within the iii-v semiconductors class.
Within the diverse III-V semiconductor family, GaSb occupies a distinct niche compared to wide-gap materials like GaN or AlN. While many of its siblings, such as GaP or AlP, function primarily as insulators or wide-gap semiconductors, GaSb is notable for its metallic character, providing a unique electronic profile that complements the broader class of III-V compounds.
Related Compounds
Other III-V Semiconductors in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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