Two-Exciton Transitions in RbMnF_3 : : I. Jahn-Teller Effects in a Pair of Excited Ions
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概要
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Jahn-Teller effects in ^4T_<1g>+^4T_<1g> excited ion pair in RbMnF_3 are studied under the assumption of the A_<1g>- and E_g-distortion. General expressions of the Jahn-Teller energy and the exciton-exciton interaction energy due to the lattice distortions are derived and examined in detail by using a simple lattice model. A positive large value of the exciton-exciton interaction energy is obtained for the lowest energy two-exciton state for certain mixing ratio of the two types of distortions, though it seems difficult at present to explain the large value observed experimentally (S.E. Stokowski, D.D. Sell and H.J. Guggenheim: Phys. Rev. B4 (1971) 3141) by the simple model adopted here. The shape and the peak position of the two-exciton phonon sideband are discussed briefly.
- 社団法人日本物理学会の論文
- 1973-01-05
著者
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Fujiwara Takeo
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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Fujiwara Takeo
Department Of Applied Physics Faculty Of Engineereing University Of Tokyo
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