Unveiling Electron-Phonon and Electron-Magnon Interactions in the Weak Itinerant Ferromagnet LaCo2P2
Journal article, 2024
Studying and understanding many-body interactions, particularly electron-boson interactions, is essential for a deeper elucidation of fundamental physical phenomena and the development of novel material functionalities. Here, this aspect is explored in the weak itinerant ferromagnet LaCo2P2 by means of momentum-resolved photoelectron spectroscopy (ARPES) and first-principles calculations. The detailed ARPES patterns enable to unveil bulk and surface bands, spin splittings due to Rashba and exchange interactions, as well as the evolution of bands with temperature, which altogether creates a solid foundation for theoretical studies. The latter has allowed to establish the impact of electron-boson interactions on the electronic structure, that are reflected in its strong renormalization driven by electron-magnon interaction and the emergence of distinctive kinks of surface and bulk electron bands due to significant electron-phonon coupling. Our results highlight the distinct impact of electron-boson interactions on the electronic structure, particularly on the itinerant d states. Similar electronic states are observed in the isostructural iron pnictides, where electron-boson interactions play a crucial role in the emergence of superconductivity. It is believed that further studies of material systems involving both magnetically active d- and f-sublattices will reveal more advanced phenomena in the bulk and at distinct surfaces, driven by a combination of factors including Rashba and Kondo effects, exchange magnetism, and electron-boson interactions.
electron-phonon interaction
ARPES
LaCo2P2
electron-magnon interaction
Author
D. Yu. Usachov
Saint Petersburg State University - Spsu
Moscow Institute of Physics and Technology
National University of Science & Technology (MISIS)
Khadiza Ali
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
G. Poelchen
Technische Universität Dresden
M. Mende
Technische Universität Dresden
S. Schulz
Technische Universität Dresden
M. Peters
Goethe University Frankfurt
K. Bokai
Saint Petersburg State University - Spsu
I. Yu. Sklyadneva
Donostia International Physics Center
V. Stolyarov
Moscow Institute of Physics and Technology
National University of Science & Technology (MISIS)
E. V. Chulkov
Donostia International Physics Center
University of the Basque Country (UPV/EHU)
Saint Petersburg State University - Spsu
K. Kliemt
Goethe University Frankfurt
S. Paischer
Johannes Kepler Univ Linz
P. A. Buczek
Hamburg University of Applied Sciences
R. Heid
Karlsruher Inst Quantum Mat & Technol IQMT
F. Hempel
Technische Universität Dresden
M. Ruesing
Padernborn University
A. Ernst
Johannes Kepler Univ Linz
Max Planck Inst Mikrostrukturphys
C. Krellner
Goethe University Frankfurt
S. V. Eremeev
Russian Academy of Sciences
D. V. Vyalikh
Basque Foundation for Science (Ikerbasque)
Donostia International Physics Center
ADVANCED PHYSICS RESEARCH
2751-1200 (ISSN)
Vol. In PressSubject Categories
Condensed Matter Physics
DOI
10.1002/apxr.202400137