Ultrafast polaron dynamics in La 0.7 Ca 0.3 MnO 3 thin films

Kaung-Hsiung Wu; T. I. Hsu; I. J. Chen; H. C. Shih; Chih-Wei Luo; T. M. Uen; Jiunn-Yuan Lin; Jenh-Yih Juang; T. Kobayashi

doi:10.1088/1742-6596/150/4/042230

Ultrafast polaron dynamics in La _0.7 Ca _0.3 MnO ₃ thin films

Kaung-Hsiung Wu, T. I. Hsu, I. J. Chen, H. C. Shih, Chih-Wei Luo, T. M. Uen, Jiunn-Yuan Lin, Jenh-Yih Juang, T. Kobayashi

研究成果: Article › 同行評審

摘要

In this work, we use ultrafast optical pump-optical probe (OPOP) spectroscopy to probe the polaron dynamics in La _0.7 Ca _0.3 MnO ₃ (LCMO) thin films. The temporal evolution in transient reflectivity change δR/R exhibits two relaxing components: a fast component with a time constant of subpicosecond and a slow component with time constant ranging from tens of ps to hundreds of ps. The amplitude of the fast component exhibits the similar temperature depence with that of the resistivity, and the neutron scattering intensity due to nanoscale correlated polarons. The results strongly suggest that the fast photoinduced reflectivity change may have been due to the photoexcitation and trapping process of correlated Jahn-Teller (T-J) polarons in the paramagnetic (PM) and ferromagnetic (FM) phases.

原文	American English
文章編號	042230
頁（從 - 到）	1-4
頁數	4
期刊	Journal of Physics: Conference Series
卷	150
發行號	4
DOIs	https://doi.org/10.1088/1742-6596/150/4/042230
出版狀態	Published - 6 8月 2008

存取文件

10.1088/1742-6596/150/4/042230

其它文件與鏈接

Link to publication in Scopus

引用此

@article{1d6c26f83e0c4bdb8dcb027f95dafcbe,

title = "Ultrafast polaron dynamics in La 0.7 Ca 0.3 MnO 3 thin films",

abstract = " In this work, we use ultrafast optical pump-optical probe (OPOP) spectroscopy to probe the polaron dynamics in La 0.7 Ca 0.3 MnO 3 (LCMO) thin films. The temporal evolution in transient reflectivity change δR/R exhibits two relaxing components: a fast component with a time constant of subpicosecond and a slow component with time constant ranging from tens of ps to hundreds of ps. The amplitude of the fast component exhibits the similar temperature depence with that of the resistivity, and the neutron scattering intensity due to nanoscale correlated polarons. The results strongly suggest that the fast photoinduced reflectivity change may have been due to the photoexcitation and trapping process of correlated Jahn-Teller (T-J) polarons in the paramagnetic (PM) and ferromagnetic (FM) phases.",

author = "Kaung-Hsiung Wu and Hsu, {T. I.} and Chen, {I. J.} and Shih, {H. C.} and Chih-Wei Luo and Uen, {T. M.} and Jiunn-Yuan Lin and Jenh-Yih Juang and T. Kobayashi",

year = "2008",

month = aug,

day = "6",

doi = "10.1088/1742-6596/150/4/042230",

language = "American English",

volume = "150",

pages = "1--4",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "4",

}

TY - JOUR

T1 - Ultrafast polaron dynamics in La 0.7 Ca 0.3 MnO 3 thin films

AU - Wu, Kaung-Hsiung

AU - Hsu, T. I.

AU - Chen, I. J.

AU - Shih, H. C.

AU - Luo, Chih-Wei

AU - Uen, T. M.

AU - Lin, Jiunn-Yuan

AU - Juang, Jenh-Yih

AU - Kobayashi, T.

PY - 2008/8/6

Y1 - 2008/8/6

N2 - In this work, we use ultrafast optical pump-optical probe (OPOP) spectroscopy to probe the polaron dynamics in La 0.7 Ca 0.3 MnO 3 (LCMO) thin films. The temporal evolution in transient reflectivity change δR/R exhibits two relaxing components: a fast component with a time constant of subpicosecond and a slow component with time constant ranging from tens of ps to hundreds of ps. The amplitude of the fast component exhibits the similar temperature depence with that of the resistivity, and the neutron scattering intensity due to nanoscale correlated polarons. The results strongly suggest that the fast photoinduced reflectivity change may have been due to the photoexcitation and trapping process of correlated Jahn-Teller (T-J) polarons in the paramagnetic (PM) and ferromagnetic (FM) phases.

AB - In this work, we use ultrafast optical pump-optical probe (OPOP) spectroscopy to probe the polaron dynamics in La 0.7 Ca 0.3 MnO 3 (LCMO) thin films. The temporal evolution in transient reflectivity change δR/R exhibits two relaxing components: a fast component with a time constant of subpicosecond and a slow component with time constant ranging from tens of ps to hundreds of ps. The amplitude of the fast component exhibits the similar temperature depence with that of the resistivity, and the neutron scattering intensity due to nanoscale correlated polarons. The results strongly suggest that the fast photoinduced reflectivity change may have been due to the photoexcitation and trapping process of correlated Jahn-Teller (T-J) polarons in the paramagnetic (PM) and ferromagnetic (FM) phases.

UR - http://www.scopus.com/inward/record.url?scp=77952530859&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/150/4/042230

DO - 10.1088/1742-6596/150/4/042230

M3 - Article

AN - SCOPUS:77952530859

VL - 150

SP - 1

EP - 4

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 4

M1 - 042230

ER -

Ultrafast polaron dynamics in La 0.7 Ca 0.3 MnO 3 thin films

摘要

存取文件

其它文件與鏈接

指紋

引用此

Ultrafast polaron dynamics in La _0.7 Ca _0.3 MnO ₃ thin films