GeTe

Name: GeTe
Brand: MatWorld

ceramic

· GeTe

GeTe is a binary compound semiconductor and phase-change material that belongs to the chalcogenide family, combining germanium and tellurium elements. It is primarily investigated for thermal energy storage, nonvolatile memory applications (such as phase-change RAM), and infrared optics, where its ability to switch between crystalline and amorphous states is exploited. GeTe is notable for its reversible structural transition and strong optical contrast between phases, making it attractive as an alternative to more common phase-change materials in next-generation data storage and advanced thermal management systems.

Phase-change memory devicesThermal energy storage systemsInfrared optics and windowsNonvolatile memory applicationsResearch-stage semiconductor devices

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	4,496.7	ksi	DFT
↳	5,350.4	ksi	DFT · OptB88vdW
↳	4,289.1	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	2.496	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Exfoliation Energy(Eexf)	543.5	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)2 entries	0.2200	-	DFT · OptB88vdW
↳	0.1777	-	DFT · PBE
Shear Modulus(G)3 entries	3,472.5	ksi	DFT
↳	3,978.4	ksi	DFT · OptB88vdW
↳	3,521.7	ksi	DFT · PBE

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2141	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.7460	eV	DFT · OptB88vdW
↳	0.8240	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	93.99	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	34.07	-	DFT · OptB88vdW
↳	25.54	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.2100	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.2767	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.9662	C/m²	DFT · OptB88vdW
↳	2.135	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00593	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00584	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-258.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	250	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	26.74	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.01610	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.09429	eV/atom	DFT · OptB88vdW
↳	-0.2513	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

GeTe — Properties & Data | MatWorld

GeTe

Mechanical Properties

Physical Properties

Electrical Properties

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Regulatory Screening

Environmental