Raman spectra of the librational phonon modes in isotopically mixed anthracene-PMDA crystals |
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| Authors: | Y Tokura T Koda |
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| Institution: | Department of Applied Physics, Faculty of Engineering, University of Tokyo, Tokyo 113, Japan |
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| Abstract: | Raman spectra have been measured for the librational phonon modes in the charge transfer complex anthracene-PMDA crystals. Utilizing the isotopically mixed crystals, assignments are made for the six librational Raman modes. From the observed isotopic effects of the Raman lines, it is concluded that the dispersions of these librational modes are highly anisotropic along the direction perpendicular to the molecular stack axis. |
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