Bi1Ge1Te2
Bi1Ge1Te2 is a semiconducting phase-change material with promising stability for use in next-generation electronic memory technologies.
About Bi1Ge1Te2
Bi1Ge1Te2 is a semiconducting ternary compound belonging to the class of phase-change memory materials. Its electronic properties and structural flexibility make it a subject of interest for advanced non-volatile memory applications where rapid switching between amorphous and crystalline states is required. As a near-hull material, it is considered highly likely to be synthesizable in a laboratory setting. Its existence within a rich landscape of reported structures underscores its versatility and potential utility in developing robust, high-performance electronic components.
Key Properties
Cross-validated computational properties for Bi1Ge1Te2, 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 Bi1Ge1Te2, 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-3m (No. 166) | trigonal | 0.50 | 0.0132 | -33.414 | 6.65 |
| Pmm2 (No. 25) | — | — | — | — | — |
| Cmm2 (No. 35) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
Applications
Where Bi1Ge1Te2 is used.
Frequently Asked Questions
Common questions about Bi1Ge1Te2, answered from cross-validated data.
What is Bi1Ge1Te2?
Bi1Ge1Te2 is a semiconducting phase-change material with promising stability for use in next-generation electronic memory technologies.
What is Bi1Ge1Te2 used for?
What is the band gap of Bi1Ge1Te2?
Is Bi1Ge1Te2 a metal, semiconductor, or insulator?
Is Bi1Ge1Te2 thermodynamically stable?
What is the crystal structure of Bi1Ge1Te2?
What is the density of Bi1Ge1Te2?
How many polymorphs of Bi1Ge1Te2 are known?
What elements does Bi1Ge1Te2 contain?
Where does the data for Bi1Ge1Te2 come from?
How It Compares
Within the phase-change memory materials class.
Within the diverse family of phase-change materials, Bi1Ge1Te2 occupies a unique niche alongside established compounds like GeTe and Ge2Sb2Te5. While GeTe serves as a foundational benchmark for phase-change behavior, Bi1Ge1Te2 offers distinct structural characteristics that may provide alternative pathways for tuning thermal and electrical switching parameters in memory devices.
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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