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@ARTICLE{Diesen:473986,
author = {Diesen, Elias and Wang, Hsin-Yi and Schreck, Simon and
Weston, Matthew and Ogasawara, Hirohito and LaRue, Jerry and
Perakis, Fivos and Dell’Angela, Martina and Capotondi,
Flavio and Giannessi, Luca and Pedersoli, Emanuele and
Naumenko, Denys and Nikolov, Ivaylo and Raimondi, Lorenzo
and Spezzani, Carlo and Beye, Martin and Cavalca, Filippo
and Liu, Boyang and Gladh, Jörgen and Koroidov, Sergey and
Miedema, Piter and Costantini, Roberto and Heinz, Tony F.
and Abild-Pedersen, Frank and Voss, Johannes and Luntz, Alan
C. and Nilsson, Anders},
title = {{U}ltrafast {A}dsorbate {E}xcitation {P}robed with
{S}ubpicosecond-{R}esolution {X}-{R}ay {A}bsorption
{S}pectroscopy},
journal = {Physical review letters},
volume = {127},
number = {1},
issn = {0031-9007},
address = {College Park, Md.},
publisher = {APS},
reportid = {PUBDB-2022-00404},
pages = {016802},
year = {2021},
abstract = {We use a pump-probe scheme to measure the time evolution of
the C K-edge x-ray absorption spectrum from CO/Ru(0001)
after excitation by an ultrashort high-intensity optical
laser pulse. Because of the short duration of the x-ray
probe pulse and precise control of the pulse delay, the
excitation-induced dynamics during the first picosecond
after the pump can be resolved with unprecedented time
resolution. By comparing with density functional theory
spectrum calculations, we find high excitation of the
internal stretch and frustrated rotation modes occurring
within 200 fs of laser excitation, as well as thermalization
of the system in the picosecond regime. The ∼100 fs
initial excitation of these CO vibrational modes is not
readily rationalized by traditional theories of nonadiabatic
coupling of adsorbates to metal surfaces, e.g., electronic
frictions based on first order electron-phonon coupling or
transient population of adsorbate resonances. We suggest
that coupling of the adsorbate to nonthermalized
electron-hole pairs is responsible for the ultrafast initial
excitation of the modes.},
cin = {CFEL-UDSS},
ddc = {530},
cid = {I:(DE-H253)CFEL-UDSS-20160914},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631)},
pid = {G:(DE-HGF)POF4-631},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {34270277},
UT = {WOS:000669052000016},
doi = {10.1103/PhysRevLett.127.016802},
url = {https://bib-pubdb1.desy.de/record/473986},
}