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Point-like spin-dependent interaction in calculations of self-energy ladder diagrams | | I. A. Nechaev
; I. Nagy
; P. M. Echenique
; E. V. Chulkov
; | | Date: |
19 Jun 2006 | | Subject: | Other | | Abstract: | An instantaneous and zero-range spin-dependent interaction, derived by summing an infinite number of electron-hole ladder diagrams within a local approximation, is analyzed as a function of the electron gas density and the relative spin polarization. The strength of such an interaction is defined by an integral of a statically screened Coulomb interaction with a spatially localized weighting factor. This weighting factor represents the mutually uncorrelated motion of an electron-hole pair in singlet or triplet spin states ($S^z=0,pm1$). An implementation, based on a Yukawa-type interaction with a spin-polarization-dependent Thomas-Fermi screening length, is given. | | Source: | arXiv, cond-mat/0606489 | | Services: | Forum | Review | PDF | Favorites | |
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