Ag2Ba2Te6Y2
Ag2Ba2Te6Y2 is a stable, semiconducting quaternary telluride used in the study and development of advanced phase-change memory technologies.
About Ag2Ba2Te6Y2
Ag2Ba2Te6Y2 is a complex, thermodynamically stable quaternary chalcogenide that functions as a semiconductor. Its position on the convex hull indicates high structural integrity, making it a subject of significant interest for researchers investigating new phase-change memory architectures. The material is characterized by its distinct atomic arrangement, which allows for the rapid, reversible transitions between amorphous and crystalline states required for non-volatile memory devices. Its unique composition of silver, barium, tellurium, and yttrium provides a specialized electronic profile compared to simpler binary chalcogenides.
Key Properties
Cross-validated computational properties for Ag2Ba2Te6Y2, 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 Ag2Ba2Te6Y2, 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. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 0.77 | 0.0000 | -4.915 | 5.99 |
| Cmcm (No. 63) | — | — | — | — | — |
| — | — | — | — | — | 6.00 |
| — | — | — | — | — | 6.00 |
| — | — | — | — | — | 5.79 |
Applications
Where Ag2Ba2Te6Y2 is used.
Frequently Asked Questions
Common questions about Ag2Ba2Te6Y2, answered from cross-validated data.
What is Ag2Ba2Te6Y2?
Ag2Ba2Te6Y2 is a stable, semiconducting quaternary telluride used in the study and development of advanced phase-change memory technologies.
What is Ag2Ba2Te6Y2 used for?
What is the band gap of Ag2Ba2Te6Y2?
Is Ag2Ba2Te6Y2 a metal, semiconductor, or insulator?
Is Ag2Ba2Te6Y2 thermodynamically stable?
What is the crystal structure of Ag2Ba2Te6Y2?
What is the density of Ag2Ba2Te6Y2?
How many polymorphs of Ag2Ba2Te6Y2 are known?
What elements does Ag2Ba2Te6Y2 contain?
Where does the data for Ag2Ba2Te6Y2 come from?
How It Compares
Within the phase-change memory materials class.
Within the broader family of phase-change memory materials, Ag2Ba2Te6Y2 offers a more complex structural landscape than standard binary compounds like Ag2Te or AgTe. While materials such as Ge2Sb2Te5 remain the industry standard for phase-change applications, the inclusion of yttrium and barium in this quaternary system allows for fine-tuning of the electronic properties, potentially offering enhanced stability or switching characteristics compared to more traditional telluride-based systems.
Related Compounds
Other Phase-Change Memory Materials in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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