Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-11-23
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
Transport properties, spectral function and optical conductivity of the adiabatic one-dimensional Su-Schrieffer-Heeger (SSH) model are studied with particular emphasis on the model parameters suitable for Rubrene single crystals based field effect transistors. We show that the mobility, calculated by using the Kubo formula for conductivity, vanishes unless we introduce an "ad hoc" broadening of the system energy levels. Furthermore, the apparent contradiction between angle resolved photoemission data and transport properties is clarified by studying the behavior of the spectral function. Finally, a peak in the optical conductivity at very low energy is obtained and discussed in connection with the available experimental data for Rubrene based devices.
Antonio Perroni Carmine
Cataudella Vittorio
Filippis Giulio de
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