Transverse Susceptibility and E-mode Raman Spectra of a KH_2PO_4 Crystal
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概要
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Low frequency E(x, y)-mode Raman spectrum of a KH_2PO_4 crystal is discussed in terms of the pseudo-spin model extended by Havlin et al. to the problem of transverse susceptibility. Temperature dependence of the susceptibility obtained from the integrated intensity of a broad continuum of the Raman spectrum can be well interpreted by their theory. The theory indicates that this mode, just like the B_2(z)-soft phonon mode, originates from a zone-center phonon corresponding to a collective proton motion in the a-b plane. Dynamics of the E-mode is also discussed in the framework of the pseudo-spin formalism and it is shown that this model is applicable not only to B_2(z) soft mode but also, at least qualitatively, to the E(x, y) mode in spite of the apparently different behaviour of the two modes with respest to the phase transition.
- 社団法人日本物理学会の論文
- 1975-08-15
著者
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SHIGENARI Takeshi
Department of Applied Physics and Chemistry,University of Electro-Communications
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Takagi Yasunari
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Takagi Yasunari
Department O Engineering Physics The University Of Electro-communications:junior College The Univers
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Shigenari Takeshi
Department O Engineering Physics The University Of Electro-communications
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