Photoinduced dynamics in spinel and pyrochlore vanadates as Mott-Hubbard insulators with magnetic ordering

被引：3

作者：

Furuhashi, A. ^{[1
]}

Nishihara, H. ^{[1
]}

Takubo, K. ^{[1
]}

Katsufuji, T. ^{[1
,2
]}

机构：

[1] Waseda Univ, Dept Phys, Tokyo 1698555, Japan

[2] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Tokyo 1690051, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 06期

关键词：

TRANSITION; PHASE;

D O I：

10.1103/PhysRevB.88.060410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied the photoinduced dynamics of spinel MnV1.8Al0.2O4 and pyrochlore Yb2V2O7 as prototypical Mott-Hubbard insulators with magnetic ordering. We found that the Mott excitation spectrum is suppressed much sooner than 1 ps after photoirradiation, and subsequently it shows an energy shift over several or several tens of picoseconds, which is caused by the melting of magnetic ordering. This indicates that the Mott excitation spectrum is dominated not only by the Coulomb repulsion energy but also by magnetic interactions, and their different energy scales lead to the different time scales in the photoinduced dynamics.

引用

页数：5

共 6 条

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