Ge - P-3m1

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1. Structure Summary

Last Updated

2022-04-20

Crystal Prototype

A

Crystal System

Hexagonal

Lattice Constant a (Å)

3.997

Lattice Constant b (Å)

3.997

Space Group

P-3m1

Formation Energy (eV/f.u.)

0.6769

2. Mechanical Properties (PBE)

2.1 Stiffness Tensors

Cij (N/m)

xx

yy

zz

xx

52.430

16.748

0.000

yy

16.748

52.430

0.000

zz

0.000

0.000

17.841

2.2 Compliance Tensors

Sij (m/N)

xx

yy

zz

xx

0.021240

-0.006785

0.000000

yy

-0.006785

0.021240

0.000000

zz

0.000000

0.000000

0.056051

2.3 Orientation-Dependent Mechanical Properties

../_images/ELASTIC-Ge_P-3m1.png

2.4 Anisotropic Mechanical Properties Of 2D Singlecrystal

Mechanical Properties

Min

Max

Anisotropy

Young’s Modulus (N/m)

47.080

47.080

1.000

Shear Modulus (N/m)

17.841

17.841

1.000

Poisson’s Ratio

0.319

0.319

1.000

2.5 Anisotropic Mechanical Properties Of 2D Polycrystal

Mechanical Properties

Min

Max

Anisotropy

Young’s Modulus (N/m)

34.589

34.589

1.000

Shear Modulus (N/m)

17.841

17.841

1.000

3. Fundmental Electronic Properties

Band Character

Direct

Band Gap (PBE, eV)

0.0000

Band Gap (HSE, eV)

0.0000

Ionization Energy (HSE, eV)

-4.545

Electron Affinity (HSE, eV)

-4.545

Location of Valence Band Maximum

[0.333333, 0.333333]

Location of Conduction Band Minimum

[0.333333, 0.333333]

3.1 Global Band Structure (PBE)

../_images/3D_band-Ge_P-3m1.jpg

3.2 Band Structure and Density of States (PBE)

../_images/BAND_LDOS-Ge_P-3m1.png

3.3 Projected Band Structure and Density of States (PBE)

../_images/BAND_PDOS_Ge-Ge_P-3m1.png

3.4 Orientation-Dependent effective Masses (PBE)

4. Optical Spectrums (HSE)

../_images/Optical-Ge_P-3m1.png

5. Phonon Spectrum and Density of States (PBE)

References

Note

For more details of this database, please refer to the following reference.

[1] V. Wang, R.-T. Wang, G. Tang, Y.-Y. Liang, Y. Kawazeo, J. Nara, W.-T. Geng, High-Throughput Computational Screening of Two-Dimensional Semiconductors, arXiv:1806.04285.

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