| Structure info | |
|---|---|
| Layer group | p6/mmm |
| Layer group number | 80 |
| Structure origin | exfoliated02-21 |
| ICSD id of parent bulk structure | ICSD 20560 |
| Stability | |
|---|---|
| Energy above convex hull [eV/atom] | 0.293 |
| Heat of formation [eV/atom] | 0.120 |
| Dynamically stable | No |
| Basic properties | |
|---|---|
| Magnetic | No |
| Band gap (PBE) [eV] | 0.000 |
| Symmetries | |
|---|---|
| 2D Bravais type | Hexagonal (hp) |
| Layer group number | 80 |
| Layer group | p6/mmm |
| Space group number (bulk in AA-stacking) | 191 |
| Space group (bulk in AA-stacking) | P6/mmm |
| Point group | 6/mmm |
| Inversion symmetry | Yes |
| Structure data | |
|---|---|
| Formula | Cu2S |
| Stoichiometry | AB2 |
| Number of atoms | 3 |
| Unit cell area [Å2] | 14.565 |
| Thickness [Å] | 0.000 |
| SCu2 (1SCu2-1) | |
|---|---|
| Heat of formation [eV/atom] | 0.12 |
| Energy above convex hull [eV/atom] | 0.29 |
| Monolayers from C2DB | |
|---|---|
| S4Cu6 (2S2Cu3-1) | -0.21 eV/atom |
| S4Cu6 (2S2Cu3-2) | -0.21 eV/atom |
| S2Cu4 (2SCu2-1) | -0.16 eV/atom |
| S2Cu4 (2SCu2-2) | -0.13 eV/atom |
| S4Cu6 (2S2Cu3-3) | -0.12 eV/atom |
| S4Cu6 (2S2Cu3-4) | -0.11 eV/atom |
| S6Cu12 (6SCu2-1) | -0.10 eV/atom |
| Cu2S2 (2CuS-1) | -0.10 eV/atom |
| Cu2S2 (2CuS-2) | -0.09 eV/atom |
| Cu2S2 (2CuS-3) | -0.05 eV/atom |
| Cu2S4 (2CuS2-1) | -0.03 eV/atom |
| Cu2S2 (2CuS-4) | -0.00 eV/atom |
| Cu2S2 (2CuS-5) | 0.03 eV/atom |
| Cu2S2 (2CuS-6) | 0.04 eV/atom |
| SCu2, (1SCu2-1) | 0.12 eV/atom |
| Cu4S14 (2Cu2S7-1) | 0.15 eV/atom |
| CuS2 (1CuS2-1) | 0.16 eV/atom |
| CuS2 (1CuS2-2) | 0.22 eV/atom |
| Cu2S5 (1Cu2S5-1) | 0.27 eV/atom |
| CuS2 (1CuS2-3) | 0.28 eV/atom |
| S2 (2S-1) | 0.45 eV/atom |
| S2 (2S-2) | 0.62 eV/atom |
| Minimum eigenvalue of Hessian [eV/Ų] | -1.14 |
| Cij (N/m) | xx | yy | xy |
| xx | 76.56 | 52.61 | -0.03 |
| yy | 52.80 | 76.89 | -0.01 |
| xy | -0.02 | 0.00 | 23.63 |
| Stiffness tensor eigenvalues | |
| Eigenvalue 0 | 23.63 N/m |
| Eigenvalue 1 | 24.03 N/m |
| Eigenvalue 2 | 129.43 N/m |
| Key values [eV] | |
|---|---|
| Band gap (PBE) | 0.000 |
| Direct band gap (PBE) | 0.000 |
| Fermi level wrt. vacuum (PBE) | -4.173 |
| Atom No. | Chemical symbol | Charges [|e|] |
|---|---|---|
| 0 | S | -0.73 |
| 1 | Cu | 0.36 |
| 2 | Cu | 0.38 |
| Miscellaneous details | |
|---|---|
| Unique ID | 1SCu2-1 |
| Number of atoms | 3 |
| Number of species | 2 |
| Formula | Cu2S |
| Reduced formula | Cu2S |
| Stoichiometry | AB2 |
| Unit cell area [Å2] | 14.565 |
| Original file-system folder | /home/niflheim2/cmr/C2DB-ASR/ICSD-COD/2el/Cu4S2 |
| Old uid | SCu2-7fb87f4f6d70 |
| Space group (bulk in AA-stacking) | P6/mmm |
| Space group number (bulk in AA-stacking) | 191 |
| Point group | 6/mmm |
| Inversion symmetry | Yes |
| Layer group number | 80 |
| Layer group | p6/mmm |
| 2D Bravais type | Hexagonal (hp) |
| Thickness [Å] | 0.000 |
| Miscellaneous details | |
|---|---|
| Structure origin | exfoliated02-21 |
| Band gap (PBE) [eV] | 0.000 |
| Direct band gap (PBE) [eV] | 0.000 |
| gap_dir_nosoc | 0.000 |
| Vacuum level [eV] | 1.184 |
| Fermi level wrt. vacuum (PBE) [eV] | -4.173 |
| minhessianeig | -1.136 |
| Dynamically stable | No |
| Energy [eV] | -11.071 |
| ICSD id of parent bulk structure | ICSD 20560 |
| 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] | 0.293 |
| Heat of formation [eV/atom] | 0.120 |
