An example of concentration sensitive electron-phonon coupling in {(C4H9)4N}3 EuxY1−x(NCS)6 and a new hypothesis for self-quenching |
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| Authors: | F Auzel GF De Sa&#x; WM de Azevedo |
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| Institution: | Centre National d''Etudes des Télécommunications 92220 Bagneux, France;Dpt. de Fisica, Universidade Federal de Pernambuco, 50000 RECIFE-Pe, Brazil |
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| Abstract: | The strong vibronic one-phonon side-bands of the 5D0 → 7F0 emission of Eu3+ in {(C4H9)4N}3 EuxY1?x(NCS)6 are used to compute the Huang-Rhys electron-phonon coupling factor (S0) of Eu3+ with the mode at 35 cm-1. Increasing concentration from 1 to 100 is found to lead to a doubling of the electron-phonon coupling strength. Generalization of such an effect is proposed as a new hypothesis for part of the self-quenching process of rare-earth ions. |
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