| Structure info | |
|---|---|
| Layer group | p2/b11 |
| Layer group number | 16 |
| Structure origin | Lyngby22_LDP |
| Stability | |
|---|---|
| Energy above convex hull [eV/atom] | 0.050 |
| Heat of formation [eV/atom] | -0.079 |
| Dynamically stable | No |
| Basic properties | |
|---|---|
| Magnetic | No |
| Band gap (PBE) [eV] | 0.124 |
| Symmetries | |
|---|---|
| 2D Bravais type | Rectangular (op) |
| Layer group number | 16 |
| Layer group | p2/b11 |
| Space group number (bulk in AA-stacking) | 13 |
| Space group (bulk in AA-stacking) | P2/c |
| Point group | 2/m |
| Inversion symmetry | Yes |
| Structure data | |
|---|---|
| Formula | I8Cu4 |
| Stoichiometry | AB2 |
| Number of atoms | 12 |
| Unit cell area [Å2] | 59.493 |
| Thickness [Å] | 3.532 |
| Cu4I8 (4CuI2-1) | |
|---|---|
| Heat of formation [eV/atom] | -0.08 |
| 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 |
| Minimum eigenvalue of Hessian [eV/Ų] | -0.11 |
| Cij (N/m) | xx | yy | xy |
| xx | 6.00 | 6.04 | 0.08 |
| yy | 5.80 | 20.22 | -0.04 |
| xy | 0.00 | -0.00 | 11.67 |
| Stiffness tensor eigenvalues | |
| Eigenvalue 0 | 3.86 N/m |
| Eigenvalue 1 | 11.67 N/m |
| Eigenvalue 2 | 22.36 N/m |
| Key values [eV] | |
|---|---|
| Band gap (PBE) | 0.124 |
| Direct band gap (PBE) | 0.166 |
| Valence band maximum wrt. vacuum (PBE) | -5.578 |
| Conduction band minimum wrt. vacuum (PBE) | -5.454 |
| Property (VBM) | Value |
|---|---|
| Min eff. mass | 2.45 m0 |
| Max eff. mass | 3.12 m0 |
| DOS eff. mass | 2.77 m0 |
| Crystal coordinates | [0.000, 0.000] |
| Warping parameter | -0.010 |
| Barrier height | > 16.4 meV |
| Distance to barrier | > 0.0181 Å-1 |
| Property (CBM) | Value |
|---|---|
| Min eff. mass | 0.26 m0 |
| Max eff. mass | 10.03 m0 |
| DOS eff. mass | 1.63 m0 |
| Crystal coordinates | [0.002, 0.386] |
| Warping parameter | 0.014 |
| Barrier height | > 8.1 meV |
| Distance to barrier | > 0.0183 Å-1 |
| Atom No. | Chemical symbol | Charges [|e|] |
|---|---|---|
| 0 | I | -0.24 |
| 1 | I | -0.24 |
| 2 | I | -0.21 |
| 3 | I | -0.21 |
| 4 | I | -0.24 |
| 5 | I | -0.24 |
| 6 | I | -0.21 |
| 7 | I | -0.21 |
| 8 | Cu | 0.41 |
| 9 | Cu | 0.41 |
| 10 | Cu | 0.47 |
| 11 | Cu | 0.47 |
| Miscellaneous details | |
|---|---|
| Unique ID | 4CuI2-1 |
| Number of atoms | 12 |
| Number of species | 2 |
| Formula | I8Cu4 |
| Reduced formula | I2Cu |
| Stoichiometry | AB2 |
| Unit cell area [Å2] | 59.493 |
| Original file-system folder | /home/niflheim2/cmr/C2DB-ASR/tree_LDP/AB2/CuI2/Cu4I8-6308e01f5578 |
| Old uid | Cu4I8-a87879c5883e |
| Space group (bulk in AA-stacking) | P2/c |
| Space group number (bulk in AA-stacking) | 13 |
| Point group | 2/m |
| Inversion symmetry | Yes |
| Layer group number | 16 |
| Layer group | p2/b11 |
| 2D Bravais type | Rectangular (op) |
| Thickness [Å] | 3.532 |
| Structure origin | Lyngby22_LDP |
| Miscellaneous details | |
|---|---|
| Band gap (PBE) [eV] | 0.124 |
| Direct band gap (PBE) [eV] | 0.166 |
| gap_dir_nosoc | 0.000 |
| Vacuum level [eV] | 1.754 |
| Fermi level wrt. vacuum (PBE) [eV] | -5.516 |
| Valence band maximum wrt. vacuum (PBE) [eV] | -5.578 |
| Conduction band minimum wrt. vacuum (PBE) [eV] | -5.454 |
| minhessianeig | -0.109 |
| Dynamically stable | No |
| Energy [eV] | -27.481 |
| 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] | 0.050 |
| Heat of formation [eV/atom] | -0.079 |
