SmAsSe
SmAsSe is a thermodynamically stable semiconducting compound containing samarium, arsenic, and selenium.
About SmAsSe
SmAsSe is a distinct ternary compound composed of samarium, arsenic, and selenium. As a thermodynamically stable material situated on the convex hull, it represents a robust phase within its chemical system, offering a reliable structural foundation for further investigation.
Characterized as a semiconductor, this material holds interest for researchers exploring the intersection of rare-earth elements and chalcogenide-pnictide chemistry. Its electronic properties suggest potential utility in specialized semiconductor applications where precise control over charge carrier behavior is required.
Key Properties
Cross-validated computational properties for SmAsSe, aggregated across 3 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.
Reported Structures
Lowest-energy structures reported for SmAsSe, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 0.55 | 0.0000 | -21.274 | 7.12 |
| P4/nmm (No. 129) | tetragonal | 0.00 | 0.0239 | -21.250 | 7.13 |
| P4/nmm (No. 129) | — | — | — | — | — |
| Pnma (No. 62) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 2.14 |
Applications
Where SmAsSe is used.
Frequently Asked Questions
Common questions about SmAsSe, answered from cross-validated data.
What is SmAsSe?
SmAsSe is a thermodynamically stable semiconducting compound containing samarium, arsenic, and selenium.
What is SmAsSe used for?
What is the band gap of SmAsSe?
Is SmAsSe a metal, semiconductor, or insulator?
Is SmAsSe thermodynamically stable?
What is the crystal structure of SmAsSe?
What is the density of SmAsSe?
How many polymorphs of SmAsSe are known?
What elements does SmAsSe contain?
Where does the data for SmAsSe come from?
How It Compares
As a unique ternary phase, SmAsSe occupies a specific niche in materials science, providing a stable platform for studying the interplay between rare-earth magnetism and semiconducting electronic structures compared to simpler binary chalcogenides or pnictides.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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