Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00560857" target="_blank" >RIV/68378271:_____/22:00560857 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/22:00126318
Result on the web
<a href="https://hdl.handle.net/11104/0333641" target="_blank" >https://hdl.handle.net/11104/0333641</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.105.235113" target="_blank" >10.1103/PhysRevB.105.235113</a>
Alternative languages
Result language
angličtina
Original language name
Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry
Original language description
We have studied ultrafast dynamics of thin films of LaCoO 3 and La 0.5 Sr 0.5 CoO 3 with femtosecond pump-probe ellipsometry in the energy range of 1.6–3.4 eV. We have observed a large pump-induced transfer of spectral weight in LaCoO 3 that corresponds to an insulator-to-metal transition. The photoinduced metallic state initially relaxes via a fast process with a decay constant of about 200 fs. Both LaCoO 3 and La 0.5 Sr 0.5 CoO 3 exhibit a significant secondary peak in the 1–30 ps range. Results of measurements on films with different thicknesses demonstrate that it corresponds to a propagation of an acoustic strain pulse. On timescales longer than 100 ps, heat diffusion to the substrate takes place that can be modeled with a biexponential decay.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
105
Issue of the periodical within the volume
23
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
235113
UT code for WoS article
000823054900004
EID of the result in the Scopus database
2-s2.0-85133655304