Structure info
Layer group cm2e
Layer group number 36
Structure origin Wang23
Stability
Energy above convex hull [eV/atom] 0.083
Heat of formation [eV/atom] 0.029
Dynamically stable No
Basic properties
Magnetic No
Band gap (PBE) [eV] 0.528
XYZ CIF JSON
Axis x [Å] y [Å] z [Å] Periodic
1 7.725 0.000 0.000 Yes
2 0.000 8.527 0.000 Yes
3 0.000 -0.000 19.878 No
Lengths [Å] 7.725 8.527 19.878
Angles [°] 90.000 90.000 90.000

Symmetries
2D Bravais type Centered rectangular (oc)
Layer group number 36
Layer group cm2e
Space group number (bulk in AA-stacking) 39
Space group (bulk in AA-stacking) Aem2
Point group mm2
Inversion symmetry No
Structure data
Formula Ag8Se12
Stoichiometry A2B3
Number of atoms 20
Unit cell area [Å2] 65.874
Thickness [Å] 4.643

Ag8Se12 (4Ag2Se3-1)
Heat of formation [eV/atom] 0.03
Energy above convex hull [eV/atom] 0.08
Monolayers from C2DB
Se2Ag4 (2SeAg2-1) -0.09 eV/atom
Se8Ag16 (8SeAg2-1) -0.07 eV/atom
Ag4Se4 (4AgSe-1) -0.02 eV/atom
Ag2Se2 (2AgSe-1) 0.02 eV/atom
Ag8Se12, (4Ag2Se3-1) 0.03 eV/atom
Ag2Se4 (2AgSe2-1) 0.05 eV/atom
Ag2Se2 (2AgSe-2) 0.05 eV/atom
Ag2Se2 (2AgSe-3) 0.06 eV/atom
AgSe2 (1AgSe2-1) 0.11 eV/atom
SeAg2 (1SeAg2-1) 0.15 eV/atom
Ag2Se2 (2AgSe-4) 0.15 eV/atom
Ag2Se2 (2AgSe-5) 0.18 eV/atom
Ag2Se4 (2AgSe2-2) 0.19 eV/atom
Se2 (2Se-1) 0.21 eV/atom
AgSe2 (1AgSe2-2) 0.22 eV/atom
Ag2Se2 (2AgSe-6) 0.27 eV/atom
Se2 (2Se-2) 0.29 eV/atom
Ag2 (2Ag-1) 0.31 eV/atom
AgSe2 (1AgSe2-3) 0.32 eV/atom
Bulk crystals from OQMD123
Ag8Se4 -0.07 eV/atom
Ag4 0.00 eV/atom
Se3 0.00 eV/atom

A2B3/4Ag2Se3/1/phonon_bs.png
Minimum eigenvalue of Hessian [eV/Ų] -0.04

Cij (N/m) xx yy xy
xx 46.48 5.87 0.00
yy 5.75 14.82 0.00
xy -0.00 -0.00 13.06
Stiffness tensor eigenvalues
Eigenvalue 0 13.06 N/m
Eigenvalue 1 13.79 N/m
Eigenvalue 2 47.51 N/m

Key values [eV]
Band gap (PBE) 0.528
Direct band gap (PBE) 0.528
Valence band maximum wrt. vacuum (PBE) -5.387
Conduction band minimum wrt. vacuum (PBE) -4.860
DOS BZ

Miscellaneous details
Unique ID 4Ag2Se3-1
Number of atoms 20
Number of species 2
Formula Ag8Se12
Reduced formula Ag2Se3
Stoichiometry A2B3
Unit cell area [Å2] 65.874
Original file-system folder /home/niflheim2/cmr/C2DB-ASR/tree_Wang23/A2B3/Ag2Se3/Ag8Se12-deaccb24f6a5
Old uid Ag8Se12-adcd7408dfaf
Space group (bulk in AA-stacking) Aem2
Space group number (bulk in AA-stacking) 39
Point group mm2
Inversion symmetry No
Layer group number 36
Layer group cm2e
2D Bravais type Centered rectangular (oc)
Thickness [Å] 4.643
Structure origin Wang23
Miscellaneous details
Band gap (PBE) [eV] 0.528
Direct band gap (PBE) [eV] 0.528
gap_dir_nosoc 0.532
Vacuum level [eV] 3.819
Fermi level wrt. vacuum (PBE) [eV] -5.124
Valence band maximum wrt. vacuum (PBE) [eV] -5.387
Conduction band minimum wrt. vacuum (PBE) [eV] -4.860
minhessianeig -0.035
Dynamically stable No
Energy [eV] -63.928
Magnetic No
Total magnetic moment [μB] 0.000
Spin axis z
Magnetic anisotropy energy, xz [meV/unit cell] 0.000
Magnetic anisotropy energy, yz [meV/unit cell] 0.000
Energy above convex hull [eV/atom] 0.083
Heat of formation [eV/atom] 0.029
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