TY  - JOUR
AU  - Shokeen, Vishal
AU  - Heber, Michael
AU  - Kutnyakhov, Dmytro
AU  - Wang, Xiaocui
AU  - Yaroslavtsev, Alexander
AU  - Maldonado, Pablo
AU  - Berritta, Marco
AU  - Wind, Nils
AU  - Wenthaus, Lukas
AU  - Pressacco, Federico
AU  - Min, Chul-Hee
AU  - Nissen, Matz
AU  - Mahatha, Sanjoy K.
AU  - Dziarzhytski, Siarhei
AU  - Oppeneer, Peter M.
AU  - Rossnagel, Kai
AU  - Elmers, Hans-Joachim
AU  - Schoenhense, Gerd
AU  - Duerr, Hermann
TI  - Real-time observation of non-equilibrium phonon-electron energy and angular momentum flow in laser-heated nickel
JO  - Science advances
VL  - 10
IS  - 5
SN  - 2375-2548
CY  - Washington, DC [u.a.]
PB  - Assoc.
M1  - PUBDB-2024-01687
SP  - eadj2407
PY  - 2024
AB  - 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. 
LB  - PUB:(DE-HGF)16
C6  - pmid:38295169
UR  - <Go to ISI:>//WOS:001185617600008
DO  - DOI:10.1126/sciadv.adj2407
UR  - https://bib-pubdb1.desy.de/record/606911
ER  -