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; Shirly ESPINOZA; Mateusz REBARZ; Jakob ANDREASSON; Ondřej CAHA; Farzin ABADIZAMAN; Dominik MUNZAR a Adam DUBROKA

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

https://doi.org/10.1103/PhysRevB.105.235113

UT WoS

000823054900004

EID Scopus

2-s2.0-85133655304

Klíčová slova anglicky

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

Štítky

14312020, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 28. 7. 2022 09:52, Mgr. Marie Novosadová 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://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 = {https://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://doi.org/10.1103/PhysRevB.105.235113.

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