%0 Journal Article
%A Shokeen, Vishal
%A Heber, Michael
%A Kutnyakhov, Dmytro
%A Wang, Xiaocui
%A Yaroslavtsev, Alexander
%A Maldonado, Pablo
%A Berritta, Marco
%A Wind, Nils
%A Wenthaus, Lukas
%A Pressacco, Federico
%A Min, Chul-Hee
%A Nissen, Matz
%A Mahatha, Sanjoy K.
%A Dziarzhytski, Siarhei
%A Oppeneer, Peter M.
%A Rossnagel, Kai
%A Elmers, Hans-Joachim
%A Schoenhense, Gerd
%A Duerr, Hermann
%T Real-time observation of non-equilibrium phonon-electron energy and angular momentum flow in laser-heated nickel
%J Science advances
%V 10
%N 5
%@ 2375-2548
%C Washington, DC [u.a.]
%I Assoc.
%M PUBDB-2024-01687
%P eadj2407
%D 2024
%X Identifying the microscopic nature of non-equilibrium energy transfer mechanisms among electronic, spin, and lattice degrees of freedom is central to understanding ultrafast phenomena such as manipulating magnetism on the femtosecond timescale. Here, we use time- and angle-resolved photoemission spectroscopy to go beyond the often-used ensemble-averaged view of non-equilibrium dynamics in terms of quasiparticle temperature evolutions. We show for ferromagnetic Ni that the non-equilibrium electron and spin dynamics display pronounced variations with electron momentum, whereas the magnetic exchange interaction remains isotropic. This highlights the influence of lattice-mediated scattering processes and opens a pathway toward unraveling the still elusive microscopic mechanism of spin-lattice angular momentum transfer. 
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:38295169
%U <Go to ISI:>//WOS:001185617600008
%R 10.1126/sciadv.adj2407
%U https://bib-pubdb1.desy.de/record/606911