Cu2S2Sm2Te2
Cu2S2Sm2Te2 is a thermodynamically stable, near-zero-gap semimetallic quaternary chalcogenide compound.
About Cu2S2Sm2Te2
Cu2S2Sm2Te2 is a complex quaternary chalcogenide that exists as a thermodynamically stable phase on the convex hull. Its structural integrity and distinct composition make it a noteworthy subject for materials research, particularly within the study of mixed-anion systems.
As a near-zero-gap semimetallic material, this compound exhibits electronic characteristics that bridge the gap between insulators and conductors. Its ability to maintain stability while hosting multiple chalcogen species suggests potential utility in specialized electronic or optoelectronic device architectures.
Key Properties
Cross-validated computational properties for Cu2S2Sm2Te2, 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 Cu2S2Sm2Te2, 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. |
|---|---|---|---|---|---|
| Pbca (No. 61) | orthorhombic | 0.09 | 0.0000 | -5.451 | 6.80 |
| — | — | — | — | — | 6.26 |
| — | — | — | — | — | 6.26 |
| No. 0 | unknown | — | — | — | 0.87 |
Applications
Where Cu2S2Sm2Te2 is used.
Frequently Asked Questions
Common questions about Cu2S2Sm2Te2, answered from cross-validated data.
What is Cu2S2Sm2Te2?
Cu2S2Sm2Te2 is a thermodynamically stable, near-zero-gap semimetallic quaternary chalcogenide compound.
What is Cu2S2Sm2Te2 used for?
What is the band gap of Cu2S2Sm2Te2?
Is Cu2S2Sm2Te2 a metal, semiconductor, or insulator?
Is Cu2S2Sm2Te2 thermodynamically stable?
What is the crystal structure of Cu2S2Sm2Te2?
What is the density of Cu2S2Sm2Te2?
How many polymorphs of Cu2S2Sm2Te2 are known?
What elements does Cu2S2Sm2Te2 contain?
Where does the data for Cu2S2Sm2Te2 come from?
How It Compares
As a unique quaternary compound, Cu2S2Sm2Te2 occupies a distinct niche in materials science. While many chalcogenides are studied for their insulating or semiconducting properties, this material's semimetallic nature sets it apart as a specialized candidate for research into electronic phase behavior.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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