Quasiparticle weight renormalization in the effective spin-fermion models
| Autor: | L. B. Litinskii, R. O. Kuzian, A. F. Barabanov |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Physics
High Energy Physics::Lattice Inverse photoemission spectroscopy General Physics and Astronomy Spectral density Angle-resolved photoemission spectroscopy Fermion Renormalization symbols.namesake Quantum mechanics Quantum electrodynamics symbols Quasiparticle Condensed Matter::Strongly Correlated Electrons Born approximation Hamiltonian (quantum mechanics) |
| Zdroj: | Physics Letters A. 273:345-348 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/s0375-9601(00)00509-0 |
| Popis: | We consider the low binding energy part of ARPES of strongly correlated systems. We map from realistic Anderson-lattice p-d Hamiltonian into spin-fermion (Kondo-lattice) model and derive an analytical expression that relates photoemission intensity from p states with the spin-polaron spectral density in the spin-fermion model. The spin-polaron problem is solved by a recently developed technique that combines Mori–Zwanzig projection method with self-consistent Born approximation. We show that photoemission intensity from the bare p-states has different ω -dependence compared the spectral density of effective fermions in Kondo-lattice. The difference leads to enhancement of coherent part of the photoemission spectrum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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