Unusual electron–phonon coupling in K5Li2SmF10

✍ Scribed by W Ryba-Romanowski; P Solarz

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 183 KB
• Volume: 377
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/s0009-2614(03)01084-4

✦ Synopsis

Unusually intense vibronic sidebands appear in the 4.2 K absorption spectra corresponding to transitions to sextet states 6 F J (J ¼ 1=2-9=2) of Sm 3þ in K 5 Li 2 SmF 10 single crystal. R value defined as the ratio of integrated intensity of vibronic sideband and the integrated intensity of no-phonon lines has been estimated to be as high as 2.64 for the 6 H 5=2 -6 F 7=2 transition. Contribution of vibronics to transitions to quartet states is negligible. Instead, the electron-phonon coupling induces strong thermal line broadening as evidenced by temperature dependence of line widths associated with the 4 G 5=2 -6 H 5=2 transition, consistent with the electron-phonon coupling parameter a $ 500 cm À1 .