Attosecond dispersive soft X-ray absorption fine-structure spectroscopy in graphite
Posted on 2018-04-23 - 16:57
Phase transitions of solids and structural transformations of molecules are canonical examples of important photo-induced processes, whose underlying mechanisms largely elude our comprehension due to our inability to correlate electronic excitation with atomic position in real time. Here, we present a decisive step towards such new methodology based on water-window covering (284 eV to 543 eV) attosecond soft X-ray pulses that can simultaneously access electronic and lattice parameters via dispersive X-ray absorption fine-structure (XAFS) spectroscopy. We validate attoXAFS with an identification of the σ* and π* orbital contributions to the density of states in graphite simultaneously with its lattice’s four characteristic bonding distances. This work demonstrates the concept of attoXAFS as a powerful real-time investigative tool which is equally applicable to gas-, liquid- and condensed phase.
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Buades, Barbara; Moonshiram, Dooshaye; Leon, Iker; Schmidt, Peter; Pi, Irina; Di Palo, Nicola; et al. (2018). Attosecond dispersive soft X-ray absorption fine-structure spectroscopy in graphite. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4053920.v1
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AUTHORS (10)
BB
Barbara Buades
DM
Dooshaye Moonshiram
IL
Iker Leon
PS
Peter Schmidt
IP
Irina Pi
ND
Nicola Di Palo
SC
Seth Cousin
AP
Antonio Picón
FK
Frank Koppens
JB
Jens Biegert