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Chin. Phys. B, 2009, Vol. 18(4): 01578    DOI: 10.1088/1674-1056/18/4/048

Ground state energy of excitons in quantum dot treated variationally via Hylleraas-like wavefunction

Abstract  In this work, the effects of quantum confinement on the ground state energy of a correlated electron--hole pair in a spherical and in a disc-like quantum dot have been investigated as a function of quantum dot size. Under parabolic confinement potential and within effective mass approximation Ritz's variational method is applied to Hylleraas-like trial wavefunction. An efficient method for reducing the main effort of the calculation of terms like rehkexp{(-λ reh)} is introduced. The main contribution of the present work is the introduction of integral transforms which provide the calculation of expectation value of energy and the related matrix elements to be done analytically over single-particle coordinates instead of Hylleraas coordinates.
Keywords:  Hylleraas coordinates      exciton      parabolic confinement      variational method     
Received:  23 July 2008      Published:  20 April 2009
PACS:  71.35.-y (Excitons and related phenomena)  
  73.21.La (Quantum dots)  
  71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor)  

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Ground state energy of excitons in quantum dot treated variationally via Hylleraas-like wavefunction 2009 Chin. Phys. B 18 01578

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