Electronic structure of ZnO wurtzite quantum wires
Chinese Center of Advanced Science and Technology (World Laboratory), Beijing, 100080, P.R. China
Corresponding author: a email@example.com
Revised: 24 January 2006
Published online: 31 March 2006
The electronic structure and optical properties of ZnO wurtzite quantum wires with radius R≥3 nm are studied in the framework of six-band effective-mass envelope function theory. The hole effective-mass parameters of ZnO wurtzite material are calculated by the empirical pseudopotential method. It is found that the electron states are either two-fold or four-fold degenerate. There is a dark exciton effect when the radius R of the ZnO quantum wires is in the range of [3,19.1] nm (dark range in our model). The dark ranges of other wurtzite semiconductor quantum wires are calculated for comparison. The dark range becomes smaller when the |Δso| is larger, which also happens in the quantum-dot systems. The linear polarization factor of ZnO quantum wires is larger when the temperature is higher.
PACS: 73.21.Hb – Quantum wires / 78.67.Lt – Quantum wires
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006