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Paper   IPM / Physic / 8113
School of Physics
  Title:   Spin-Density-Functional Theory for A Parabolic Quantum Dot in A Magnetic Field
  Author(s):  R. Asgari
  Status:   In Proceedings
  Proceeding: Proceeding of The IASBS 12th Meeting on Condensed Matter Physics, pages: E1-E4, May 25-26, 2006
  Year:  2006
  Pages:   E1-E4
  Supported by:  IPM
In this talk, I will briefly review the spin-density-functional theory, quantum dot systems and apply the theory to the case of electrons confined in two-dimensional parabolic quantum dots. We first use spin-density-functional theory to determine spin densities that are compared with Diffusion Monte Carlo (DMC) data over a broad range of coupling strength and electron number. This accurate knowledge of one-body properties is then used to construct and test a local approximation for the electron-pair correlations. We find very satisfactory agreement between this local scheme and the available DMC data, and provide a detailed picture of two-body correlations in a coupling-strength regime preceding the formation of Wigner-like electron ordering. This talk is based on our recent paper [M. Gattobigi et al., Phys. Rev. B 72, 045306 (2005)]

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