Inhaltszusammenfassung

We present a simple model for the electron-phonon interactions between the energy subbands in polyacene field-effect transistors and the vibrations of the crystal. we introduce a generalized schrieffer-heeger model, arguing that the strongest electron-phonon interactions in these systems originate from the dependence of inter-molecule hopping amplitudes on collective molecular motion. we compute the electron-phonon spectral function alpha(2)f(w) as a function of two-dimensional hole density a...We present a simple model for the electron-phonon interactions between the energy subbands in polyacene field-effect transistors and the vibrations of the crystal. we introduce a generalized schrieffer-heeger model, arguing that the strongest electron-phonon interactions in these systems originate from the dependence of inter-molecule hopping amplitudes on collective molecular motion. we compute the electron-phonon spectral function alpha(2)f(w) as a function of two-dimensional hole density and the coupling strength constant. our results are in agreement with the sharp onset of superconductivity near half-filling discovered in recent experiments by schon et al. {[}1] and predict an increase of t-c with pressure. we further speculate on the implications that the observation of the quantum hall effect in these systems has on the effective band mass in the low carrier density regime.» weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
3.17 - Theoretische Chemie

DDC Sachgruppe:
Physik