科研之友
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摘要
A many-body calculation for the conductance of a molecular dot consisting from a simple molecule between two electrodes has been given. The experimental results showed that the conductance G = dI/dV has the maximum value near the quantum unit G(0) = 2e(2)/h. The current-voltage dependence presents peak and dip and we consider that the electron-phonon interaction is responsible for this behavior. At zero temperature there is a step in this dependence for the energy of phonons 4 which satisfies eV = omega(0). We calculated the conductance at finite temperature and showed that dG(T)/dV proportional to 1/4T cosh 2 eV-omega(0)/2T. The model explain the behavior of the conductance of the simplest setup which contains a hydrogen molecule between two metallic leads.
- 出版日期2008
