Ultrafast spectral weight transfer in RBaCo2O6-δ (R = Sm, Gd, and Tb): Role of electronic correlation in a photoinduced phase transition

被引：13

作者：

Okimoto, Y. ^{[1
]}

Miyata, T. ^{[1
]}

Endo, M. S. ^{[1
]}

Kurashima, M. ^{[1
]}

Onda, K. ^{[2
]}

Ishikawa, T. ^{[1
]}

Koshihara, S. ^{[1
,3
]}

Lorenc, M. ^{[4
]}

Collet, E. ^{[4
]}

Cailleau, H. ^{[4
]}

Arima, T. ^{[5
]}

机构：

[1] Tokyo Inst Technol, Dept Mat Sci, Meguro Ku, Tokyo 1528551, Japan

[2] Tokyo Inst Technol, Dept Environm Chem & Engn, Yokohama, Kanagawa 2268503, Japan

[3] JST, CREST, Chiyoda Ku, Tokyo 1020075, Japan

[4] CNRS Univ, UMR 6251, Inst Phys Rennes, F-35042 Rennes, France

[5] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 12期

关键词：

METAL-INSULATOR-TRANSITION; SPIN-STATE TRANSITION;

D O I：

10.1103/PhysRevB.84.121102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We performed femtosecond reflection spectroscopy on a series of A-site ordered perovskite-type cobalt oxide RBaCo2O6-delta (R = Sm, Gd, and Tb) crystals, in which the electronic transfer was controlled by R. The transient reflectivity and the optical conductivity [sigma(PI)(omega)] obtained by a Kramers-Kronig analysis showed an ultrafast change within a time resolution (approximate to 150 fs) at room temperature and the appearance of signals of a hidden state that were different from the high-temperature metallic state. The transferred spectral weight in sigma(PI)(omega) upon photoexcitation sensitively depended on the R species, indicating an important role of electronic correlation in the photoexcited state.

引用

页数：5

共 14 条

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PHYSICAL REVIEW B, 2006, 73 (07)
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PHYSICAL REVIEW B, 2007, 75 (15):
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[5] LOW-TEMPERATURE STRUCTURAL PHASE-TRANSITION AND ELECTRONIC ANOMALIES IN LA1.775R0.10SR0.125CUO4 (R=ND,SM,GD,TB)
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PHYSICAL REVIEW B, 1994, 49 (17): : 12392 - 12395
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JOURNAL OF SOLID STATE CHEMISTRY, 2022, 315
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