Structure info
Layer group p31m
Layer group number 70
Structure origin Wang23
Stability
Energy above convex hull [eV/atom] 0.053
Heat of formation [eV/atom] -0.102
Dynamically stable No
Basic properties
Magnetic No
Band gap (PBE) [eV] 0.120
XYZ CIF JSON
Axis x [Å] y [Å] z [Å] Periodic
1 10.809 -0.000 0.000 Yes
2 -5.404 9.361 0.000 Yes
3 -0.000 0.000 19.069 No
Lengths [Å] 10.809 10.809 19.069
Angles [°] 90.000 90.000 120.000

Symmetries
2D Bravais type Hexagonal (hp)
Layer group number 70
Layer group p31m
Space group number (bulk in AA-stacking) 157
Space group (bulk in AA-stacking) P31m
Point group 3m
Inversion symmetry No
Structure data
Formula Cu9I11
Stoichiometry A9B11
Number of atoms 20
Unit cell area [Å2] 101.181
Thickness [Å] 4.106

Cu9I11 (1Cu9I11-1)
Heat of formation [eV/atom] -0.10
Energy above convex hull [eV/atom] 0.05
Monolayers from C2DB
Cu2I2 (2CuI-1) -0.17 eV/atom
Cu2I2 (2CuI-2) -0.16 eV/atom
Cu3I3 (3CuI-1) -0.15 eV/atom
Cu5I5 (5CuI-1) -0.14 eV/atom
Cu6I6 (6CuI-1) -0.14 eV/atom
Cu4I4 (4CuI-1) -0.13 eV/atom
CuI2 (1CuI2-1) -0.13 eV/atom
Cu2I3 (1Cu2I3-1) -0.12 eV/atom
Cu4I6 (2Cu2I3-1) -0.12 eV/atom
Cu3I6 (3CuI2-1) -0.11 eV/atom
Cu9I11, (1Cu9I11-1) -0.10 eV/atom
Cu6I6 (6CuI-2) -0.10 eV/atom
Cu3I3 (3CuI-2) -0.10 eV/atom
Cu6I6 (6CuI-3) -0.10 eV/atom
Cu3I3 (3CuI-3) -0.10 eV/atom
Cu3I3 (3CuI-4) -0.09 eV/atom
Cu2I4 (2CuI2-1) -0.09 eV/atom
Cu3I5 (1Cu3I5-1) -0.09 eV/atom
Cu4I4 (4CuI-2) -0.09 eV/atom
CuI (1CuI-1) -0.08 eV/atom
Cu4I8 (4CuI2-1) -0.08 eV/atom
Cu4I8 (4CuI2-2) -0.08 eV/atom
Cu3I4 (1Cu3I4-1) -0.07 eV/atom
Cu2I4 (2CuI2-2) -0.06 eV/atom
Cu4I6 (2Cu2I3-2) -0.05 eV/atom
CuI2 (1CuI2-2) -0.05 eV/atom
Cu2I5 (1Cu2I5-1) -0.03 eV/atom
Cu2I6 (2CuI3-1) 0.05 eV/atom
CuI2 (1CuI2-3) 0.09 eV/atom
Cu2I6 (2CuI3-2) 0.10 eV/atom
Bulk crystals from OQMD123
CuI -0.16 eV/atom
Cu 0.00 eV/atom
I4 0.00 eV/atom

A9B11/1Cu9I11/1/phonon_bs.png
Minimum eigenvalue of Hessian [eV/Ų] -0.14

Cij (N/m) xx yy xy
xx 8.88 8.37 -0.12
yy 8.07 8.27 -0.16
xy 0.00 0.00 0.80
Stiffness tensor eigenvalues
Eigenvalue 0 0.36 N/m
Eigenvalue 1 0.80 N/m
Eigenvalue 2 16.80 N/m

Key values [eV]
Band gap (PBE) 0.120
Direct band gap (PBE) 0.129
Valence band maximum wrt. vacuum (PBE) -5.176
Conduction band minimum wrt. vacuum (PBE) -5.056
DOS BZ

Miscellaneous details
Unique ID 1Cu9I11-1
Number of atoms 20
Number of species 2
Formula Cu9I11
Reduced formula Cu9I11
Stoichiometry A9B11
Unit cell area [Å2] 101.181
Original file-system folder /home/niflheim2/cmr/C2DB-ASR/tree_Wang23/A9B11/Cu9I11/Cu9I11-73c460fa2b94
Old uid Cu9I11-c18d4da06325
Space group (bulk in AA-stacking) P31m
Space group number (bulk in AA-stacking) 157
Point group 3m
Inversion symmetry No
Layer group number 70
Layer group p31m
2D Bravais type Hexagonal (hp)
Thickness [Å] 4.106
Structure origin Wang23
Miscellaneous details
Band gap (PBE) [eV] 0.120
Direct band gap (PBE) [eV] 0.129
gap_dir_nosoc 0.000
Vacuum level [eV] 2.702
Fermi level wrt. vacuum (PBE) [eV] -5.116
Valence band maximum wrt. vacuum (PBE) [eV] -5.176
Conduction band minimum wrt. vacuum (PBE) [eV] -5.056
minhessianeig -0.138
Dynamically stable No
Energy [eV] -51.393
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] 0.053
Heat of formation [eV/atom] -0.102