Journal Article

FZJ-2019-01194

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Kink far below the Fermi level reveals new electron-magnon scattering channel in Fe

Młyńczak, E. (Corresponding author) ; Müller, M. C. T. D.FZJ* ; Gospodarič, P.FZJ* ; Heider, T.FZJ* ; Aguilera, I.FZJ* ; Bihlmayer, G.FZJ* ; Gehlmann, M. ; Jugovac, M.FZJ* ; Zamborlini, G.FZJ* ; Tusche, C.FZJ* ; Suga, S.FZJ* ; Feyer, V.FZJ* ; Plucinski, L.FZJ* ; Friedrich, C.FZJ* ; Blügel, S.FZJ* ; Schneider, C. M.FZJ*

2019
Nature Publishing Group UK [London]

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/21527  doi:10.1038/s41467-019-08445-1

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 (Eb = 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.

---

Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)
5. Elektronische Eigenschaften (PGI-6)
6. Photovoltaik (IEK-5)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)
2. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2019

---

Database coverage:
; ; ; ; BIOSIS Previews ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

---