Electronic structure of wurtzite quantum dots with cylindrical symmetry
  This paper presents a six-band k.p theory for wurtzite semiconductor nanostructures with cylindrical symmetry. Our work extends the formulation of Vahala and Sercel [Physical Review Letters 65, 239 (1990)] to the Rashba-Sheka-Pikus Hamiltonian for wurtzite semiconductors, without the need for the axial approximation. Results comparing our formulation for studying the electronic structure of wurzite quantum dots with the conventional formulation are given. 
L. C. Lew Yan Voon, C. Galeriu, B. Lassen, M. Willatzen and R. Melnik