Dynamics of photoinduced melting of charge/orbital order in a layered manganite La0.5Sr1.5MnO4

被引：93

作者：

Ogasawara, T ^{[1
]}

Kimura, T

Ishikawa, T

Kuwata-Gonokami, M

Tokura, Y

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] Correlated Electron Res Ctr, Tsukuba, Ibaraki 3050046, Japan

[3] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3050046, Japan

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.63.113105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoinduced effects on the charge- and orbital-ordered (CO/OO) states in a layered perovskite manganite La0.5Sr1.5MnO4 have been investigated with femtosecond polarization-sensitive pump-probe spectroscopy. Disappearance of the optical birefringence as well as conspicuous change of the optical:spectrum indicates the immediate destruction of the CO/OO states upon photoexcitation. A large difference in the temporal evolution of the birefringence and the reflectivity change was observed, indicating that the adiabatic, fast (<200 fs) photomelting of the CO/OO states is followed by slow (10 ps-10 ns) evolution of the lattice disorder, which is subject to the critical slowing down effect as the temperature approaches T-CO = 220 K.

引用

页数：3

共 25 条

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