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Effect of lattice excitations on transient near edge X-ray absorption spectroscopy
- Source :
- Physical review / B 104(14), 144302 (2021). doi:10.1103/PhysRevB.104.144302
- Publication Year :
- 2019
-
Abstract
- Time-dependent and constituent-specific spectral changes in soft near edge X-ray spectroscopy (XAS) of an [Fe/MgO]$_8$ metal/insulator heterostructure upon laser excitation are analyzed at the O K-edge with picosecond time resolution. The oxygen absorption edge of the insulator features a uniform intensity decrease of the fine structure at elevated phononic temperatures, which can be quantified by a simple simulation and fitting procedure presented here. Combining X-ray absorption spectroscopy with ultrafast electron diffraction measurements and ab initio calculations demonstrate that the transient intensity changes in XAS can be assigned to a transient lattice temperature. Thus, the sensitivity of transient near edge XAS to phonons is demonstrated.<br />10 pages, 6 figures
- Subjects :
- X-ray absorption spectroscopy
Condensed Matter - Materials Science
Materials science
Absorption spectroscopy
Phonon
Ultrafast electron diffraction
Lattice (group)
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
Physik (inkl. Astronomie)
Molecular physics
Condensed Matter::Materials Science
Ab initio quantum chemistry methods
Picosecond
Condensed Matter::Superconductivity
ddc:530
Condensed Matter::Strongly Correlated Electrons
Excitation
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical review / B 104(14), 144302 (2021). doi:10.1103/PhysRevB.104.144302
- Accession number :
- edsair.doi.dedup.....c62f51958d94f200705ff8b22c6f4ed5