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- W2887671036 abstract "Many properties of real materials can be modeled using ab initio methods within a single-particle picture. However, for an accurate theoretical treatment of excited states, it is necessary to describe electron-electron correlations including interactions with bosons: phonons, plasmons, or magnons. In this work, by comparing spin- and momentum-resolved photoemission spectroscopy measurements to many-body calculations carried out with a newly developed first-principles method, we show that a kink in the electronic band dispersion of a ferromagnetic material can occur at much deeper binding energies than expected (E_b=1.5 eV). We demonstrate that the observed spectral signature reflects the formation of a many-body state that includes a photohole bound to a coherent superposition of renormalized spin-flip excitations. The existence of such a many-body state sheds new light on the physics of the electron-magnon interaction which is essential in fields such as spintronics and Fe-based superconductivity." @default.
- W2887671036 created "2018-08-22" @default.
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- W2887671036 date "2019-01-31" @default.
- W2887671036 modified "2023-10-13" @default.
- W2887671036 title "Kink far below the Fermi level reveals new electron-magnon scattering channel in Fe" @default.
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- W2887671036 doi "https://doi.org/10.1038/s41467-019-08445-1" @default.
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