Co2Ge1Te1
Co2Ge1Te1 is a stable, semiconducting chalcogenide material utilized in the research and development of phase-change memory technologies.
About Co2Ge1Te1
Co2Ge1Te1 is a semiconducting compound that occupies a unique position within the family of phase-change materials. As a thermodynamically stable phase located on the convex hull, it offers robust structural integrity, which is a critical requirement for materials intended for high-density data storage applications.
Its electronic character makes it a candidate for switching mechanisms in memory devices. By leveraging the transition between structural states, this compound contributes to the ongoing development of non-volatile memory architectures that require both reliability and efficient performance.
Key Properties
Cross-validated computational properties for Co2Ge1Te1, aggregated across 2 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 Co2Ge1Te1, 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. |
|---|---|---|---|---|---|
| R-3 (No. 148) | trigonal | 0.45 | 0.0000 | -18.201 | 6.39 |
| R-3m (No. 166) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| Pmm2 (No. 25) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
Applications
Where Co2Ge1Te1 is used.
Frequently Asked Questions
Common questions about Co2Ge1Te1, answered from cross-validated data.
What is Co2Ge1Te1?
Co2Ge1Te1 is a stable, semiconducting chalcogenide material utilized in the research and development of phase-change memory technologies.
What is Co2Ge1Te1 used for?
What is the band gap of Co2Ge1Te1?
Is Co2Ge1Te1 a metal, semiconductor, or insulator?
Is Co2Ge1Te1 thermodynamically stable?
What is the crystal structure of Co2Ge1Te1?
What is the density of Co2Ge1Te1?
How many polymorphs of Co2Ge1Te1 are known?
What elements does Co2Ge1Te1 contain?
Where does the data for Co2Ge1Te1 come from?
How It Compares
Within the phase-change memory materials class.
While classic phase-change materials like GeTe and Ge2Sb2Te5 are widely recognized for their rapid switching capabilities, Co2Ge1Te1 distinguishes itself through its specific thermodynamic stability. Unlike some of the more complex chalcogenide alloys that may face challenges with phase segregation, this compound represents a well-defined stoichiometric phase that provides a different structural baseline for evaluating memory performance compared to binary systems like Ag2Te or Sb2Te3.
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).
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