Temperature effect in the conductance of hydrogen molecule

Details Temperature effect in the conductance of hydrogen molecule Temperature effect in the conductance of hydrogen molecule

2008-10-17

arxiv.org/abs/0810.3120v1

Physica E 41, 130, (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages

Scientific paper

10.1016/j.physe.2008.06.027

We present a many-body calculation for the conductance of a conducting bridge of a simple hydrogen molecule between $Pt$ electrodes.The experimental results showed that the conductance $G=dI/dV$ has the maximum value near the quantum unit $G_{0}=2e^{2}/h$. The $I-V$ dependence presents peak and dip and we consider that the electron-phonon interaction is responsible for this behavior. At T=0 there is a step in this dependence for the energy of phonons $\omega_{0}$ which satisfies $eV=\omega_{0}$. We calculated the conductance at finite temperature and showed that $dG(T)/dV\propto 1/4T\cosh^{2}\frac{eV-\omega_{0}}{2T}$.

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