Anomalously broad Raman scattering spectrum due to two-magnon excitation in hexagonal YMnO3 -: art. no. 076404

被引：17
|
作者：
Takahashi, J
Hagita, K
Kohn, K
Tanabe, Y
Hanamura, E
机构：
[1] Japan Sci & Technol Corp, CREST, Chitose, Hokkaido 0668655, Japan
[2] Waseda Univ, Sch Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan
[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[4] Chitose Inst Sci & Technol, Chitose, Hokkaido 0668655, Japan
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.89.076404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A strong and broad Raman scattering (RS) spectrum is observed from two-magnon processes in YMnO3. The spectrum is analyzed by taking account (i) the magnon-exciton interaction and (ii) the magnon-phonon coupling in the intermediate state. Anomalous broadening of the RS is attributed to the large superexchange interaction between manganite ions and subsequent modification of magnons under the presence of the exciton and phonons in the intermediate state.
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页码：1 / 076404
页数：4
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