Search: onr:"swepub:oai:lup.lub.lu.se:dcf1a443-9398-48c9-8ea5-3071dcede85c" > Fourier-transform i...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 03301naa a2200541 4500 | |
001 | oai:lup.lub.lu.se:dcf1a443-9398-48c9-8ea5-3071dcede85c | |
003 | SwePub | |
008 | 160401s2013 | |||||||||||000 ||eng| | |
024 | 7 | a https://lup.lub.lu.se/record/42728692 URI |
024 | 7 | a https://doi.org/10.1038/NPHYS27882 DOI |
040 | a (SwePub)lu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Trigo, M.4 aut |
245 | 1 0 | a Fourier-transform inelastic X-ray scattering from time- and momentum-dependent phonon-phonon correlations |
264 | 1 | c 2013 |
520 | a The macroscopic characteristics of a material are determined by its elementary excitations, which dictate the response of the system to external stimuli. The spectrum of excitations is related to fluctuations in the density-density correlations and is typically measured through frequency-domain neutron(1) or X-ray(2-4) scattering. Time-domain measurements of these correlations could yield a more direct way to investigate the excitations of solids and their couplings both near to and far from equilibrium. Here we show that we can access large portions of the phonon dispersion of germanium by measuring the diffuse scattering from femtosecond X-ray free-electron laser pulses. A femtosecond optical laser pulse slightly quenches the vibrational frequencies, producing pairs of high-wavevector phonons with opposite momenta. These phonons manifest themselves as time-dependent coherences in the displacement correlations(5) probed by the X-ray scattering. As the coherences are preferentially created in regions of strong electron-phonon coupling, the time-resolved approach is a natural spectroscopic tool for probing low-energy collective excitations in solids, and their microscopic interactions. | |
650 | 7 | a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng |
700 | 1 | a Fuchs, M.4 aut |
700 | 1 | a Chen, J.4 aut |
700 | 1 | a Jiang, M. P.4 aut |
700 | 1 | a Cammarata, M.4 aut |
700 | 1 | a Fahy, S.4 aut |
700 | 1 | a Fritz, D. M.4 aut |
700 | 1 | a Gaffney, K.4 aut |
700 | 1 | a Ghimire, S.4 aut |
700 | 1 | a Higginbotham, A.4 aut |
700 | 1 | a Johnson, S. L.4 aut |
700 | 1 | a Kozina, M. E.4 aut |
700 | 1 | a Larsson, Jörgenu Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)fysi-jla |
700 | 1 | a Lemke, H.4 aut |
700 | 1 | a Lindenberg, A. M.4 aut |
700 | 1 | a Ndabashimiye, G.4 aut |
700 | 1 | a Quirin, F.4 aut |
700 | 1 | a Sokolowski-Tinten, K.4 aut |
700 | 1 | a Uher, C.4 aut |
700 | 1 | a Wang, G.4 aut |
700 | 1 | a Wark, J. S.4 aut |
700 | 1 | a Zhu, D.4 aut |
700 | 1 | a Reis, D. A.4 aut |
710 | 2 | a Atomfysikb Fysiska institutionen4 org |
773 | 0 | t Nature Physicsg 9:12, s. 790-794q 9:12<790-794x 1745-2473 |
856 | 4 | u http://dx.doi.org/10.1038/NPHYS2788y FULLTEXT |
856 | 4 8 | u https://lup.lub.lu.se/record/4272869 |
856 | 4 8 | u https://doi.org/10.1038/NPHYS2788 |
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