Vibronic conductor

The first two terms describe, respectively, the radical electrons and the molecular vibrations in the absence of vibronic coupling. Linear electron-molecular vibration (e-mv) coupling is described explicitly by the third term in Eq. (2). The set of G constants gj denotes linear monomer TT-electron - molecular vibration coupling constants. In the following sections, the indicatrix measurements, electronic and molecular spectroscopies, and other techniques are analyzed as methods of characterizing the organic conductors. 

Different approaches have also been proposed. For instance, Painelli et al. [23] have expressed the frequency-dependent conductivity of dimerized and trimerized organic conductors on the base of vibronic adiabatic Mulliken theory. They have shown that the calculated spectrum is virtually identical to the one obtained from linear response theory. 

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