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Our continued fraction method (CFM) for the one-electron Green function combines rigorous microscopic expressions for leading spectral moments with a phenomenological Fermi liquid terminator [1,2]. First, I give a general introduction to ARPES theory in the framework of the sudden approximation, involving the one-electron Green function. Then, I discuss the insight provided by the CFM to the following problems:
- Quasiparticle weight and dynamical weight transfer across the correlation gap in the doped Hubbard model - Energy distribution curve (EDC) at small and interrmediate energy scales. Dispersion of the extrema ("peaks") in the EDC - Phenomenology of interference between quasiparticle- and background-spectrum [1] K. Matho, J. of Electr. Spectr. & Rel. Phenom. 117, 13 (2001) [2] R. Hayn, P. Lombardo and K. Matho, Phys. Rev. B 74, 205124 (2006) |
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