Effects of Electric Field on the Valence-Bond Property of an Electron in a Quantum-Dot Molecule
WANG Li-Min1,2, LUO Ying1, MA Ben-Kun1
1Department of Physics and Institute of Theoretical
Physics, Beijing Normal University, Beijing 100875
1Department of Physics, Hebei Normal University, Shijiazhuang 050091
Effects of Electric Field on the Valence-Bond Property of an Electron in a Quantum-Dot Molecule
WANG Li-Min1,2; LUO Ying1;MA Ben-Kun1
1Department of Physics and Institute of Theoretical
Physics, Beijing Normal University, Beijing 100875
1Department of Physics, Hebei Normal University, Shijiazhuang 050091
Abstract： The electronic structure of the quantum-dot molecules in an electric field is investigated by the finite element method with the effective mass approximation. The numerical calculation results show that the valence bond of the quantum-dot molecule alternates between covalent bonds and ionic bonds as the electric field increases. The valence-bond property can be reflected by the oscillator strength of the intraband transition. The bound state with the highest energy level in the quantum-dot molecule gradually changes into a quasibound state when the electric field increases.
WANG Li-Min; LUO Ying;MA Ben-Kun. Effects of Electric Field on the Valence-Bond Property of an Electron in a Quantum-Dot Molecule[J]. 中国物理快报, 2002, 19(6): 846-849.
WANG Li-Min, LUO Ying, MA Ben-Kun. Effects of Electric Field on the Valence-Bond Property of an Electron in a Quantum-Dot Molecule. Chin. Phys. Lett., 2002, 19(6): 846-849.
2002, Vol. 19 
