| Structure info | |
|---|---|
| Layer group | p-3m1 |
| Layer group number | 72 |
| Structure origin | exfoliated02-21 |
| COD id of parent bulk structure | COD 4343762 |
| Stability | |
|---|---|
| Energy above convex hull [eV/atom] | 0.000 |
| Heat of formation [eV/atom] | -1.039 |
| Dynamically stable | Yes |
| Basic properties | |
|---|---|
| Magnetic | No |
| Topology | Z2=1 |
| Band gap (PBE) [eV] | 0.000 |
| Symmetries | |
|---|---|
| 2D Bravais type | Hexagonal (hp) |
| Layer group number | 72 |
| Layer group | p-3m1 |
| Space group number (bulk in AA-stacking) | 164 |
| Space group (bulk in AA-stacking) | P-3m1 |
| Point group | -3m |
| Inversion symmetry | Yes |
| Structure data | |
|---|---|
| Formula | Zr2Br2 |
| Stoichiometry | AB |
| Number of atoms | 4 |
| Unit cell area [Å2] | 10.821 |
| Thickness [Å] | 6.120 |
| Br2Zr2 (2BrZr-1) | |
|---|---|
| Heat of formation [eV/atom] | -1.04 |
| Energy above convex hull [eV/atom] | 0.00 |
| Monolayers from C2DB | |
|---|---|
| Zr2Br6 (2ZrBr3-1) | -1.36 eV/atom |
| Zr2Br4 (2ZrBr2-1) | -1.34 eV/atom |
| ZrBr2 (1ZrBr2-1) | -1.34 eV/atom |
| Zr2Br6 (2ZrBr3-2) | -1.33 eV/atom |
| ZrBr2 (1ZrBr2-2) | -1.23 eV/atom |
| Br2Zr2, (2BrZr-1) | -1.04 eV/atom |
| Br2Zr2 (2BrZr-2) | -0.97 eV/atom |
| Br16Zr18 (2Br8Zr9-1) | -0.88 eV/atom |
| ZrBr2 (1ZrBr2-3) | -0.88 eV/atom |
| Br12Zr13 (1Br12Zr13-1) | -0.81 eV/atom |
| Br2Zr2 (2BrZr-3) | -0.58 eV/atom |
| Br2Zr2 (2BrZr-4) | -0.34 eV/atom |
| Minimum eigenvalue of Hessian [eV/Ų] | -0.00 |
| Cij (N/m) | xx | yy | xy |
| xx | 79.34 | 43.83 | -0.00 |
| yy | 43.85 | 79.28 | -0.00 |
| xy | 0.00 | -0.00 | 32.64 |
| Stiffness tensor eigenvalues | |
| Eigenvalue 0 | 32.64 N/m |
| Eigenvalue 1 | 35.47 N/m |
| Eigenvalue 2 | 123.16 N/m |
| Key values [eV] | |
|---|---|
| Band gap (PBE) | 0.000 |
| Direct band gap (PBE) | 0.045 |
| Valence band maximum wrt. vacuum (PBE) | -3.463 |
| Conduction band minimum wrt. vacuum (PBE) | -3.463 |
| Atom No. | Chemical symbol | Charges [|e|] |
|---|---|---|
| 0 | Zr | 0.64 |
| 1 | Zr | 0.64 |
| 2 | Br | -0.64 |
| 3 | Br | -0.64 |
| Properties | |
|---|---|
| Interband polarizability (x) [Å] | 65.343 |
| Interband polarizability (y) [Å] | 65.343 |
| Interband polarizability (z) [Å] | 0.587 |
| Plasma frequency (x) [eV Å0.5] | 1.529 |
| Plasma frequency (y) [eV Å0.5] | 1.529 |
| Miscellaneous details | |
|---|---|
| Unique ID | 2BrZr-1 |
| Number of atoms | 4 |
| Number of species | 2 |
| Formula | Zr2Br2 |
| Reduced formula | ZrBr |
| Stoichiometry | AB |
| Unit cell area [Å2] | 10.821 |
| Original file-system folder | /home/niflheim2/cmr/C2DB-ASR/ICSD-COD/2el/Zr6Br6 |
| Old uid | Br2Zr2-9f1f7cc976e2 |
| Space group (bulk in AA-stacking) | P-3m1 |
| Space group number (bulk in AA-stacking) | 164 |
| Point group | -3m |
| Inversion symmetry | Yes |
| Layer group number | 72 |
| Layer group | p-3m1 |
| 2D Bravais type | Hexagonal (hp) |
| Thickness [Å] | 6.120 |
| Structure origin | exfoliated02-21 |
| Band gap (PBE) [eV] | 0.000 |
| Direct band gap (PBE) [eV] | 0.045 |
| gap_dir_nosoc | 0.000 |
| Miscellaneous details | |
|---|---|
| Vacuum level [eV] | 2.829 |
| Fermi level wrt. vacuum (PBE) [eV] | -3.463 |
| Valence band maximum wrt. vacuum (PBE) [eV] | -3.463 |
| Conduction band minimum wrt. vacuum (PBE) [eV] | -3.463 |
| minhessianeig | -0.000 |
| Dynamically stable | Yes |
| Interband polarizability (x) [Å] | 65.343 |
| Interband polarizability (y) [Å] | 65.343 |
| Interband polarizability (z) [Å] | 0.587 |
| Plasma frequency (x) [eV Å0.5] | 1.529 |
| Plasma frequency (y) [eV Å0.5] | 1.529 |
| Energy [eV] | -22.130 |
| COD id of parent bulk structure | COD 4343762 |
| Magnetic | No |
| Spin axis | z |
| Magnetic anisotropy energy, xz [meV/unit cell] | 0.000 |
| Magnetic anisotropy energy, yz [meV/unit cell] | 0.000 |
| Topology | Z2=1 |
| Energy above convex hull [eV/atom] | 0.000 |
| Heat of formation [eV/atom] | -1.039 |
