Fano interference between the E2 (17 cm−1) optical mode and one-phonon continuum scattering from β-AgI |
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| Authors: | A Fontana G Mariotto E Cazzanelli F Rocca MP Fontana |
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| Institution: | Dipartimento di Fisica, Università di Trento and GNSM-CNR, Università di Trento 38050, Povo (Trento, Italy;Istituto per la Ricerca Scientifica e Tecnologica, Trento, Italy;Istituto di Fisica and GNSM-CNR, Università di Parma, Parma, Italy |
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| Abstract: | Resonant interference between the E2 (17 cm?1) optical mode and the continuum of one-phonon partial density of states has been observed in β-AgI, and has been shown to follow Fano formalism. The temperature dependence of the coupling parameter q shows a substantial variation as T approaches Tc. A qualitative explanation of such behaviour is made in terms of phonon assisted activation of Frenkel defects, which increases more rapidly as the superionic transition temperature is approached. |
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