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Copper Oxide
Crystal: Cu2O
Structure: simple cubic, two molecules in cell
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Cohesive energy: |
eV |
Lattice parameter: |
2.46 Å |
Density: |
g/cm3 |
Stiffness constants: in 1011 dynes/cm2, at room temperature
c11: 12.61 (neutron) or 11.65 (v/s) (Ref.1)
c12: 10.68 or 10.0
c44: 1.36 or 1.21
Compressibility (in 1011 dynes/cm2):
Poisson ratio:
Debye temperature: K
Melting temperature: ° C
Neel temperature: K
Phonon spectrum discussed by:
M.M. Berg, S.M. Shapiro Study of phonon dispersion relations in cuprous oxide by inelastic neutron scattering, Phys.Rev. B13, 1728 (1976)
Neutron data: see phonon spectrum. The reference gives also:
Zone centre:
G
25: 87±2 cm-1G
12‘: 105±3 cm-1G
15: 146±1 cm-1G
2‘: 347 cm-1Transverse optic phonon T0 (k=0): cm-1
Longitude optic phonon L0 (k=0): cm-1
Gruneissen constant:
Ratio e*/e:
Photoelastic constants:
p11:
p12:
p44:
Band gap:
direct: eV.
indirect: eV.
Gap: eV.
First exciton: eV.
Band structure discussed by:
Static dielectric constant: 7.5±0.2 for h
Optic dielectric constant: 6.46 for h
n > 660 cm-1 or 4.0
Electron mobility:
Hole mobility:
Polaron coupling constant:
a = ( for m*=1 )Polaron radius: 8.83
Effective mass:
conduction band:
valence band:
Electron affinity: ( in eV., from bottom of conduction band under vacuum)
Spin-orbit coupling: ( valence band)
Cation polarisation: Å-3
Anion polarisation: Å-3
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Other information:
J.W. Hodby, T.E. Jenkins and C. Schwab, Cyclotron resonance of electrons and of holes in cuprous oxide, Cu2O, J. Phys. C9, 1429 (1976)
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References:
1. J. Hallberg, R.C. Hanson, The elastic constants of Cuprous Oxide, Phys. Stat. Sol. 42, 305 (1970)
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