Nanoscale heat transport studied by high-resolution time-resolved x-ray diffraction
(2011) In New Journal of Physics 13.- Abstract
- We report on synchrotron-based high-repetition rate ultrafast x-ray diffraction (UXRD) experiments monitoring the transport of heat from an epitaxial La0.7Sr0.3MnO3/SrTiO3 superlattice (SL) into the substrate on timescales from 100 ps to 4 mu s. Transient thermal lattice expansion was determined with an accuracy of 10(-7), corresponding to a sensitivity to temperature changes down to 0.01 K. We follow the heat flow within the SL and into the substrate after the impulsive laser heating leads to a small temperature rise of Delta T = 6 K. The transient lattice temperature can be simulated very well using the bulk heat conductivities. This contradicts the interpretation of previous UXRD measurements, which predicted a long-lasting expansion of... (More)
- We report on synchrotron-based high-repetition rate ultrafast x-ray diffraction (UXRD) experiments monitoring the transport of heat from an epitaxial La0.7Sr0.3MnO3/SrTiO3 superlattice (SL) into the substrate on timescales from 100 ps to 4 mu s. Transient thermal lattice expansion was determined with an accuracy of 10(-7), corresponding to a sensitivity to temperature changes down to 0.01 K. We follow the heat flow within the SL and into the substrate after the impulsive laser heating leads to a small temperature rise of Delta T = 6 K. The transient lattice temperature can be simulated very well using the bulk heat conductivities. This contradicts the interpretation of previous UXRD measurements, which predicted a long-lasting expansion of SrRuO3 for more than 200 ps. The disagreement could be resolved by assuming that the heat conductivity changes in the first hundred picoseconds. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2254156
- author
- Shayduk, Roman ; Navirian, Hengameh ; Leitenberger, Wolfram ; Goldshteyn, Jevgenij ; Vrejoiu, Ionela ; Weinelt, Martin ; Gaal, Peter ; Herzog, Marc ; von Korff Schmising, Clemens LU and Bargheer, Matias
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- New Journal of Physics
- volume
- 13
- article number
- 093032
- publisher
- IOP Publishing
- external identifiers
-
- wos:000296649400003
- scopus:80053417297
- ISSN
- 1367-2630
- DOI
- 10.1088/1367-2630/13/9/093032
- language
- English
- LU publication?
- yes
- id
- f44ac29d-37a2-4306-9edf-a8d8990b32a6 (old id 2254156)
- date added to LUP
- 2016-04-01 14:24:41
- date last changed
- 2022-04-22 03:07:49
@article{f44ac29d-37a2-4306-9edf-a8d8990b32a6, abstract = {{We report on synchrotron-based high-repetition rate ultrafast x-ray diffraction (UXRD) experiments monitoring the transport of heat from an epitaxial La0.7Sr0.3MnO3/SrTiO3 superlattice (SL) into the substrate on timescales from 100 ps to 4 mu s. Transient thermal lattice expansion was determined with an accuracy of 10(-7), corresponding to a sensitivity to temperature changes down to 0.01 K. We follow the heat flow within the SL and into the substrate after the impulsive laser heating leads to a small temperature rise of Delta T = 6 K. The transient lattice temperature can be simulated very well using the bulk heat conductivities. This contradicts the interpretation of previous UXRD measurements, which predicted a long-lasting expansion of SrRuO3 for more than 200 ps. The disagreement could be resolved by assuming that the heat conductivity changes in the first hundred picoseconds.}}, author = {{Shayduk, Roman and Navirian, Hengameh and Leitenberger, Wolfram and Goldshteyn, Jevgenij and Vrejoiu, Ionela and Weinelt, Martin and Gaal, Peter and Herzog, Marc and von Korff Schmising, Clemens and Bargheer, Matias}}, issn = {{1367-2630}}, language = {{eng}}, publisher = {{IOP Publishing}}, series = {{New Journal of Physics}}, title = {{Nanoscale heat transport studied by high-resolution time-resolved x-ray diffraction}}, url = {{http://dx.doi.org/10.1088/1367-2630/13/9/093032}}, doi = {{10.1088/1367-2630/13/9/093032}}, volume = {{13}}, year = {{2011}}, }