Photoinduced insulator-to-metal transition and coherent
acoustic phonon propagation in LaCoO3 thin films explored by
femtosecond pump-probe ellipsometry

J 2022

Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry

ZAHRADNÍK, Martin, Michal KIABA, Shirly ESPINOZA, Mateusz REBARZ, Jakob ANDREASSON et. al.

Základní údaje

Originální název

Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry

Autoři

ZAHRADNÍK, Martin, Michal KIABA (703 Slovensko, domácí), Shirly ESPINOZA, Mateusz REBARZ, Jakob ANDREASSON, Ondřej CAHA (203 Česká republika, domácí), Farzin ABADIZAMAN (364 Írán, domácí), Dominik MUNZAR (203 Česká republika, domácí) a Adam DUBROKA (203 Česká republika, garant, domácí)

Vydání

Physical Review B, College PK, The American Physical Society, 2022, 2469-9950

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.700

Kód RIV

RIV/00216224:14310/22:00126318

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1103/PhysRevB.105.235113

UT WoS

000823054900004

Klíčová slova anglicky

Carrier dynamics; Heat transfer; Lifetimes & widths; Metal-insulator transition; Optical conductivity

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 28. 7. 2022 09:52, Mgr. Marie Šípková, DiS.

Anotace

V originále

We have studied ultrafast dynamics of thin films of LaCoO3 and La0.5Sr0.5CoO3 with femtosecond pumpprobe ellipsometry in the energy range of 1.6???3.4 eV. We have observed a large pump-induced transfer of spectral weight in LaCoO3 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 LaCoO3 and La0.5Sr0.5CoO3 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.

Návaznosti

EF18_053/0016952, projekt VaV

Název: Postdoc2MUNI

GA20-10377S, projekt VaV

Název: Jevy v heterostrukturách oxidů přechodových kovů vyvolané dopováním a rozhraním (Akronym: TMO Heterostructures)

Investor: Grantová agentura ČR, Jevy v heterostrukturách oxidů přechodových kovů vyvolané dopováním a rozhraním

Citovat

ZAHRADNÍK, Martin, Michal KIABA, Shirly ESPINOZA, Mateusz REBARZ, Jakob ANDREASSON, Ondřej CAHA, Farzin ABADIZAMAN, Dominik MUNZAR a Adam DUBROKA. Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry. Physical Review B. College PK: The American Physical Society, 2022, roč. 105, č. 23, s. 1-8. ISSN 2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.105.235113.

@article{1876137,
   author = {Zahradník, Martin and Kiaba, Michal and Espinoza, Shirly and Rebarz, Mateusz and Andreasson, Jakob and Caha, Ondřej and Abadizaman, Farzin and Munzar, Dominik and Dubroka, Adam},
   article_location = {College PK},
   article_number = {23},
   doi = {http://dx.doi.org/10.1103/PhysRevB.105.235113},
   keywords = {Carrier dynamics; Heat transfer; Lifetimes & widths; Metal-insulator transition; Optical conductivity},
   language = {eng},
   issn = {2469-9950},
   journal = {Physical Review B},
   title = {Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry},
   url = {https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.235113},
   volume = {105},
   year = {2022}
}

TY  - JOUR
ID  - 1876137
AU  - Zahradník, Martin - Kiaba, Michal - Espinoza, Shirly - Rebarz, Mateusz - Andreasson, Jakob - Caha, Ondřej - Abadizaman, Farzin - Munzar, Dominik - Dubroka, Adam
PY  - 2022
TI  - Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry
JF  - Physical Review B
VL  - 105
IS  - 23
SP  - 1-8
EP  - 1-8
PB  - The American Physical Society
SN  - 24699950
KW  - Carrier dynamics
KW  - Heat transfer
KW  - Lifetimes & widths
KW  - Metal-insulator transition
KW  - Optical conductivity
UR  - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.235113
N2  - We have studied ultrafast dynamics of thin films of LaCoO3 and La0.5Sr0.5CoO3 with femtosecond pumpprobe ellipsometry in the energy range of 1.6???3.4 eV. We have observed a large pump-induced transfer of spectral weight in LaCoO3 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 LaCoO3 and La0.5Sr0.5CoO3 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.
ER  -

ZAHRADNÍK, Martin, Michal KIABA, Shirly ESPINOZA, Mateusz REBARZ, Jakob ANDREASSON, Ondřej CAHA, Farzin ABADIZAMAN, Dominik MUNZAR a Adam DUBROKA. Photoinduced insulator-to-metal transition and coherent acoustic phonon propagation in LaCoO3 thin films explored by femtosecond pump-probe ellipsometry. \textit{Physical Review B}. College PK: The American Physical Society, 2022, roč.~105, č.~23, s.~1-8. ISSN~2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.105.235113.

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