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
electron-magnon interaction
LaCo2P2
ARPES
Author
D. Yu. Usachov
National University of Science & Technology (MISIS)
Moscow Institute of Physics and Technology
Saint Petersburg State University - Spsu
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
National University of Science & Technology (MISIS)
Moscow Institute of Physics and Technology
E. V. Chulkov
University of the Basque Country (UPV/EHU)
Saint Petersburg State University - Spsu
Donostia International Physics Center
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
Max Planck Society
Johannes Kepler Univ Linz
C. Krellner
Goethe University Frankfurt
S. V. Eremeev
Russian Academy of Sciences
D. V. Vyalikh
Donostia International Physics Center
Basque Foundation for Science (Ikerbasque)
ADVANCED PHYSICS RESEARCH
2751-1200 (ISSN)
Vol. In PressSubject Categories (SSIF 2011)
Condensed Matter Physics
DOI
10.1002/apxr.202400137