Ultrafast photoinduced formation of metallic state in a perovskite-type manganite with short range charge and orbital order

Yoichi Okimoto; Hiroyuki Matsuzaki; Yasuhide Tomioka; Istvan Kezsmarki; Takeshi Ogasawara; Masakazu Matsubara; Hiroshi Okamoto; Yoshinori Tokura

doi:10.1143/JPSJ.76.043702

Ultrafast photoinduced formation of metallic state in a perovskite-type manganite with short range charge and orbital order

Yoichi Okimoto, Hiroyuki Matsuzaki, Yasuhide Tomioka, Istvan Kezsmarki, Takeshi Ogasawara, Masakazu Matsubara, Hiroshi Okamoto, Yoshinori Tokura

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Femtosecond reflection spectroscopy was performed on a perovskite-type manganite, Gd_0.55Sr_0.45MnO₃, with the short-range charge and orbital order (CO/OO). Immediately after the photoirradiation, a large increase of the reflectivity was detected in the mid-infrared region. The optical conductivity spectrum under photoirradiation obtained from the Kramers-Kronig analyses of the reflectivity changes demonstrates a formation of a metallic state. This suggests that ferromagnetic spin arrangements occur within the time resolution (∼200 fs) through the double exchange interaction, resulting in an ultrafast CO/OO to FM switching.

Original language	English
Article number	043702
Journal	journal of the physical society of japan
Volume	76
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.76.043702
Publication status	Published - 2007 Apr
Externally published	Yes

Keywords

Optical conductivity
Perovskite-type manganite
Photoinduced phase transition
Ultrafast phenomena

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.76.043702

Cite this

@article{6d60e580e7254513b9d702a26bb6ff6e,

title = "Ultrafast photoinduced formation of metallic state in a perovskite-type manganite with short range charge and orbital order",

abstract = "Femtosecond reflection spectroscopy was performed on a perovskite-type manganite, Gd0.55Sr0.45MnO3, with the short-range charge and orbital order (CO/OO). Immediately after the photoirradiation, a large increase of the reflectivity was detected in the mid-infrared region. The optical conductivity spectrum under photoirradiation obtained from the Kramers-Kronig analyses of the reflectivity changes demonstrates a formation of a metallic state. This suggests that ferromagnetic spin arrangements occur within the time resolution (∼200 fs) through the double exchange interaction, resulting in an ultrafast CO/OO to FM switching.",

keywords = "Optical conductivity, Perovskite-type manganite, Photoinduced phase transition, Ultrafast phenomena",

author = "Yoichi Okimoto and Hiroyuki Matsuzaki and Yasuhide Tomioka and Istvan Kezsmarki and Takeshi Ogasawara and Masakazu Matsubara and Hiroshi Okamoto and Yoshinori Tokura",

year = "2007",

month = apr,

doi = "10.1143/JPSJ.76.043702",

language = "English",

volume = "76",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "4",

}

TY - JOUR

T1 - Ultrafast photoinduced formation of metallic state in a perovskite-type manganite with short range charge and orbital order

AU - Okimoto, Yoichi

AU - Matsuzaki, Hiroyuki

AU - Tomioka, Yasuhide

AU - Kezsmarki, Istvan

AU - Ogasawara, Takeshi

AU - Matsubara, Masakazu

AU - Okamoto, Hiroshi

AU - Tokura, Yoshinori

PY - 2007/4

Y1 - 2007/4

N2 - Femtosecond reflection spectroscopy was performed on a perovskite-type manganite, Gd0.55Sr0.45MnO3, with the short-range charge and orbital order (CO/OO). Immediately after the photoirradiation, a large increase of the reflectivity was detected in the mid-infrared region. The optical conductivity spectrum under photoirradiation obtained from the Kramers-Kronig analyses of the reflectivity changes demonstrates a formation of a metallic state. This suggests that ferromagnetic spin arrangements occur within the time resolution (∼200 fs) through the double exchange interaction, resulting in an ultrafast CO/OO to FM switching.

AB - Femtosecond reflection spectroscopy was performed on a perovskite-type manganite, Gd0.55Sr0.45MnO3, with the short-range charge and orbital order (CO/OO). Immediately after the photoirradiation, a large increase of the reflectivity was detected in the mid-infrared region. The optical conductivity spectrum under photoirradiation obtained from the Kramers-Kronig analyses of the reflectivity changes demonstrates a formation of a metallic state. This suggests that ferromagnetic spin arrangements occur within the time resolution (∼200 fs) through the double exchange interaction, resulting in an ultrafast CO/OO to FM switching.

KW - Optical conductivity

KW - Perovskite-type manganite

KW - Photoinduced phase transition

KW - Ultrafast phenomena

UR - http://www.scopus.com/inward/record.url?scp=34247092928&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34247092928&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.76.043702

DO - 10.1143/JPSJ.76.043702

M3 - Article

AN - SCOPUS:34247092928

VL - 76

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 4

M1 - 043702

ER -

Ultrafast photoinduced formation of metallic state in a perovskite-type manganite with short range charge and orbital order

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this