Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects
Time-resolved hard x-ray photoelectron spectroscopy (trHAXPES) is established using the x-ray free-electron laser SACLA. The technique extends time-resolved photoemission into the hard x-ray regime and, as a core-level spectroscopy, combines element and atomic-site specificity and sensitivity to the...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/12/123045 |
| _version_ | 1797751527941603328 |
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| author | L-P Oloff M Oura K Rossnagel A Chainani M Matsunami R Eguchi T Kiss Y Nakatani T Yamaguchi J Miyawaki M Taguchi K Yamagami T Togashi T Katayama K Ogawa M Yabashi T Ishikawa |
| author_facet | L-P Oloff M Oura K Rossnagel A Chainani M Matsunami R Eguchi T Kiss Y Nakatani T Yamaguchi J Miyawaki M Taguchi K Yamagami T Togashi T Katayama K Ogawa M Yabashi T Ishikawa |
| author_sort | L-P Oloff |
| collection | DOAJ |
| description | Time-resolved hard x-ray photoelectron spectroscopy (trHAXPES) is established using the x-ray free-electron laser SACLA. The technique extends time-resolved photoemission into the hard x-ray regime and, as a core-level spectroscopy, combines element and atomic-site specificity and sensitivity to the chemical environment with femtosecond time resolution and bulk (sub-surface) sensitivity. The viability of trHAXPES using 8 keV x-ray free-electron-laser radiation is demonstrated by a systematic investigation of probe and pump pulse-induced vacuum space-charge effects on the V 1s emission of VO _2 and the Ti 1s emission of SrTiO _3 . The time and excitation energy dependencies of the measured spectral shifts and broadenings are compared to the results of N -body numerical simulations and simple analytic (mean-field) models. Good agreement between the experimental and calculated results is obtained. In particular, the characteristic temporal evolution of the pump pulse-induced spectral shift is shown to provide an effective means to determine the temporal overlap of pump and probe pulses. trHAXPES opens a new avenue in the study of ultrafast atomic-site specific electron and chemical dynamics in materials and at buried interfaces. |
| first_indexed | 2024-03-12T16:49:47Z |
| format | Article |
| id | doaj.art-984159e13d844f5bb87fd15351324e77 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:49:47Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-984159e13d844f5bb87fd15351324e772023-08-08T11:24:01ZengIOP PublishingNew Journal of Physics1367-26302014-01-01161212304510.1088/1367-2630/16/12/123045Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effectsL-P Oloff0M Oura1K Rossnagel2A Chainani3M Matsunami4R Eguchi5T Kiss6Y Nakatani7T Yamaguchi8J Miyawaki9M Taguchi10K Yamagami11T Togashi12T Katayama13K Ogawa14M Yabashi15T Ishikawa16Institute of Experimental and Applied Physics, University of Kiel , D-24098 Kiel, Germany; RIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanInstitute of Experimental and Applied Physics, University of Kiel , D-24098 Kiel, Germany; RIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, Japan; UVSOR, Institute for Molecular Science , Okazaki, Aichi 444-8585, Japan; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, Japan; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan; Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, JapanGraduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, JapanGraduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, JapanGraduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, JapanISSP/The University of Tokyo, Sayo-cho, Hyogo 679-5198, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanGraduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, JapanJASRI/XFEL, Sayo-cho, Hyogo 679-5198, JapanJASRI/XFEL, Sayo-cho, Hyogo 679-5198, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanRIKEN SPring-8 Center, Sayo-cho, Hyogo 679-5148, JapanTime-resolved hard x-ray photoelectron spectroscopy (trHAXPES) is established using the x-ray free-electron laser SACLA. The technique extends time-resolved photoemission into the hard x-ray regime and, as a core-level spectroscopy, combines element and atomic-site specificity and sensitivity to the chemical environment with femtosecond time resolution and bulk (sub-surface) sensitivity. The viability of trHAXPES using 8 keV x-ray free-electron-laser radiation is demonstrated by a systematic investigation of probe and pump pulse-induced vacuum space-charge effects on the V 1s emission of VO _2 and the Ti 1s emission of SrTiO _3 . The time and excitation energy dependencies of the measured spectral shifts and broadenings are compared to the results of N -body numerical simulations and simple analytic (mean-field) models. Good agreement between the experimental and calculated results is obtained. In particular, the characteristic temporal evolution of the pump pulse-induced spectral shift is shown to provide an effective means to determine the temporal overlap of pump and probe pulses. trHAXPES opens a new avenue in the study of ultrafast atomic-site specific electron and chemical dynamics in materials and at buried interfaces.https://doi.org/10.1088/1367-2630/16/12/123045time-resolved photoelectron spectroscopyx-ray free-electron laserspace-charge effects |
| spellingShingle | L-P Oloff M Oura K Rossnagel A Chainani M Matsunami R Eguchi T Kiss Y Nakatani T Yamaguchi J Miyawaki M Taguchi K Yamagami T Togashi T Katayama K Ogawa M Yabashi T Ishikawa Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects New Journal of Physics time-resolved photoelectron spectroscopy x-ray free-electron laser space-charge effects |
| title | Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects |
| title_full | Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects |
| title_fullStr | Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects |
| title_full_unstemmed | Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects |
| title_short | Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects |
| title_sort | time resolved haxpes at sacla probe and pump pulse induced space charge effects |
| topic | time-resolved photoelectron spectroscopy x-ray free-electron laser space-charge effects |
| url | https://doi.org/10.1088/1367-2630/16/12/123045 |
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