Structure info
Layer group p4/mbm
Layer group number 63
Structure origin original03-18
Stability
Energy above convex hull [eV/atom] 0.405
Heat of formation [eV/atom] -0.040
Dynamically stable No
Basic properties
Magnetic No
Band gap (PBE) [eV] 0.000
XYZ CIF JSON
Axis x [Å] y [Å] z [Å] Periodic
1 6.958 -0.000 0.000 Yes
2 -0.000 6.963 0.000 Yes
3 0.000 0.000 15.378 No
Lengths [Å] 6.958 6.963 15.378
Angles [°] 90.000 90.000 90.000

Symmetries
2D Bravais type Square (tp)
Layer group number 63
Layer group p4/mbm
Space group number (bulk in AA-stacking) 127
Space group (bulk in AA-stacking) P4/mbm
Point group 4/mmm
Inversion symmetry Yes
Structure data
Formula In2Se4
Stoichiometry AB2
Number of atoms 6
Unit cell area [Å2] 48.449
Thickness [Å] 0.005

In2Se4 (2InSe2-4)
Heat of formation [eV/atom] -0.04
Energy above convex hull [eV/atom] 0.40
Monolayers from C2DB
In2Se2 (2InSe-1) -0.54 eV/atom
In2Se2 (2InSe-2) -0.53 eV/atom
In4Se6 (2In2Se3-1) -0.53 eV/atom
In2Se3 (1In2Se3-1) -0.53 eV/atom
In8Se12 (4In2Se3-1) -0.51 eV/atom
In3Se4 (1In3Se4-1) -0.51 eV/atom
In2Se2 (2InSe-3) -0.50 eV/atom
In2Se3 (1In2Se3-2) -0.50 eV/atom
Se12In13 (1Se12In13-1) -0.49 eV/atom
In2Se3 (1In2Se3-3) -0.48 eV/atom
Se12In14 (2Se6In7-1) -0.44 eV/atom
Se12In15 (3Se4In5-1) -0.42 eV/atom
In2Se2 (2InSe-4) -0.39 eV/atom
In2Se5 (1In2Se5-1) -0.36 eV/atom
In2Se2 (2InSe-5) -0.29 eV/atom
In2Se2 (2InSe-6) -0.23 eV/atom
In2Se4 (2InSe2-1) -0.22 eV/atom
InSe2 (1InSe2-1) -0.21 eV/atom
In2Se3 (1In2Se3-4) -0.16 eV/atom
In2Se4 (2InSe2-2) -0.16 eV/atom
In2Se4 (2InSe2-3) -0.11 eV/atom
In2Se4, (2InSe2-4) -0.04 eV/atom
InSe4 (1InSe4-1) 0.04 eV/atom
Se2 (2Se-1) 0.21 eV/atom
Se2 (2Se-2) 0.29 eV/atom
Bulk crystals from OQMD123
In4Se4 -0.53 eV/atom
In12Se18 -0.53 eV/atom
In 0.00 eV/atom
Se3 0.00 eV/atom

AB2/2InSe2/4/phonon_bs.png
Minimum eigenvalue of Hessian [eV/Ų] -0.14

Cij (N/m) xx yy xy
xx 35.02 25.88 0.01
yy 25.77 35.16 0.00
xy 0.00 0.00 7.60
Stiffness tensor eigenvalues
Eigenvalue 0 7.60 N/m
Eigenvalue 1 9.26 N/m
Eigenvalue 2 60.91 N/m

Key values [eV]
Band gap (PBE) 0.000
Direct band gap (PBE) 0.000
Fermi level wrt. vacuum (PBE) -5.025
DOS BZ

AB2/2InSe2/4/fermi_surface.png

Atom No. Chemical symbol Charges [|e|]
0 In 0.84
1 In 0.84
2 Se -0.41
3 Se -0.43
4 Se -0.43
5 Se -0.41

AB2/2InSe2/4/rpa-pol-x.png AB2/2InSe2/4/rpa-pol-z.png
AB2/2InSe2/4/rpa-pol-y.png
Properties
Interband polarizability (x) [Å] 5.359
Interband polarizability (y) [Å] 5.255
Interband polarizability (z) [Å] 0.211
Plasma frequency (x) [eV Å0.5] 6.656
Plasma frequency (y) [eV Å0.5] 6.710

Miscellaneous details
Unique ID 2InSe2-4
Number of atoms 6
Number of species 2
Formula In2Se4
Reduced formula InSe2
Stoichiometry AB2
Unit cell area [Å2] 48.449
Original file-system folder /home/niflheim2/cmr/C2DB-ASR/tree/AB2/InSe2/In2Se4-a96bc6848369
Old uid In2Se4-a96bc6848369
Space group (bulk in AA-stacking) P4/mbm
Space group number (bulk in AA-stacking) 127
Point group 4/mmm
Inversion symmetry Yes
Layer group number 63
Layer group p4/mbm
2D Bravais type Square (tp)
Thickness [Å] 0.005
Structure origin original03-18
Band gap (PBE) [eV] 0.000
Miscellaneous details
Direct band gap (PBE) [eV] 0.000
gap_dir_nosoc 0.000
Vacuum level [eV] 2.189
Fermi level wrt. vacuum (PBE) [eV] -5.025
minhessianeig -0.142
Dynamically stable No
Interband polarizability (x) [Å] 5.359
Interband polarizability (y) [Å] 5.255
Interband polarizability (z) [Å] 0.211
Plasma frequency (x) [eV Å0.5] 6.656
Plasma frequency (y) [eV Å0.5] 6.710
Energy [eV] -19.698
Magnetic No
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] 0.405
Heat of formation [eV/atom] -0.040
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