PdSe2 - P2

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1. Structure Summary

Last Updated

2022-04-20

Crystal Prototype

AB2

Crystal System

Rectangular

Lattice Constant a (Å)

3.716

Lattice Constant b (Å)

6.436

Space Group

P2

Formation Energy (eV/f.u.)

-0.4653

2. Mechanical Properties (PBE)

2.1 Stiffness Tensors

Cij (N/m)

xx

yy

zz

xx

57.177

17.015

0.000

yy

17.015

56.980

0.000

zz

0.000

0.000

20.069

2.2 Compliance Tensors

Sij (m/N)

xx

yy

zz

xx

0.019195

-0.005732

0.000000

yy

-0.005732

0.019262

0.000000

zz

0.000000

0.000000

0.049828

2.3 Orientation-Dependent Mechanical Properties

../_images/ELASTIC-PdSe2_P2_1^m.png

2.4 Anisotropic Mechanical Properties Of 2D Singlecrystal

Mechanical Properties

Min

Max

Anisotropy

Young’s Modulus (N/m)

51.917

52.101

1.004

Shear Modulus (N/m)

20.032

20.069

1.002

Poisson’s Ratio

0.297

0.299

1.005

2.5 Anisotropic Mechanical Properties Of 2D Polycrystal

Mechanical Properties

Min

Max

Anisotropy

Young’s Modulus (N/m)

37.047

37.047

1.004

Shear Modulus (N/m)

20.050

20.050

1.002

3. Fundmental Electronic Properties

Band Character

Indirect

Band Gap (PBE, eV)

0.6773

Band Gap (HSE, eV)

1.1199

Ionization Energy (HSE, eV)

-5.916

Electron Affinity (HSE, eV)

-4.796

Effective Mass of Electron Max. (m0)

5.052

Effective Mass of Electron Min. (m0)

0.789

Effective Mass of Hole Max. (m0)

12.956

Effective Mass of Hole Min. (m0)

-0.761

Location of Valence Band Maximum

[0.000000, 0.000000]

Location of Conduction Band Minimum

[0.000000, 0.000000]

3.1 Global Band Structure (PBE)

../_images/3D_band-PdSe2_P2_1^m.jpg

3.2 Band Structure and Density of States (PBE)

../_images/BAND_LDOS-PdSe2_P2_1^m.png

3.3 Projected Band Structure and Density of States (PBE)

../_images/BAND_PDOS_Pd-PdSe2_P2_1^m.png ../_images/BAND_PDOS_Se-PdSe2_P2_1^m.png

3.4 Orientation-Dependent effective Masses (PBE)

../_images/EMC-PdSe2_P2_1^m.png

4. Optical Spectrums (HSE)

../_images/Optical-PdSe2_P2_1^m.png

5. Phonon Spectrum and Density of States (PBE)

../_images/phonon_BAND_LDOS-PdSe2_P2_1^m.png

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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