Browsing by Author "Zelezný, Vladimir"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • Thumbnail Image
    ItemOpen Access
    Far infrared response of α- and αt-(BEDT-TTF)2I3
    (1990) Zelezný, Vladimir; Petzelt, Jan; Swietlik, Roman; Gorshunov, Boris P.; Volkov, Alexander; Kozlov, Gennadij; Schweitzer, Dieter; Keller, Heimo J.
    The temperature dependence of the reflectivity of α- and αt-(BEDT-TTF)2I3 was determined in the 10-700 cm-1 range. Moreover the transmission spectra of α-phase between 10 and 33 cm-1 were studied. Using Kramers-Kronig analysis the IR conductivity and permittivity were calculated. The similarity of α t and β-phases was confirmed. The spectra in the metallic phase are dominated by a broad electronic peak between 200 and 500 cm-1 which can be understood as due to transitions across the small gap whose origin is discussed. In the spectra a rich phonon peak structure is observed, mostly of vibronic origin. It is suggested that non totally symmetric modes of BEDT-TTF molecule can couple with electrons.