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  • Electronic structure of quantum spheres with wurtzite structure

    • 摘要:

      The hole effective-mass Hamiltonian for the semiconductors with wurtzite structure is given. The effective-mass parameters are determined by fitting the valence-band structure near the top with that calculated by the empirical pseudopotential method. The energies and corresponding wave functions are calculated with the obtained effective-mass Hamiltonian for the CdSe quantum spheres, and the energies as functions of sphere radius R are given for the zero spin-orbital coupling (SOC) and finite SOC cases. The energies do not vary as 1/R2 as the general cases, which is caused by the crystal-field splitting energy and the linear terms in the Hamiltonian. It is found that the ground state is not the optically active S state for the R smaller than 30Å, in agreement with the experimental results and the “dark exciton” theory. © 1999 The American Physical Society.

    • 作者:

      Xia Jian-Bai;Li Jingbo

    • 刊名:

      Physical Review B Condensed Matter and Materials Physics

    • 在线出版时间:

      1999