Shot noise and thermopower in aromatic molecules

• The quantum transport of aromatic molecules connected to two semi-infinite leads is studied.
• We use Green׳s function techniques within a real space renormalization scheme.
• We calculate the transmission probability, the shot noise and the thermopower.
• Our results show different transport regimes as a function of the coupling and the length of chains.

The quantum transport properties of finite homogeneous chains of aromatic molecules composed of one, two or several benzene rings connected to two semi-infinite leads are studied. We study these molecules based on the tight-binding approach. The calculation of the transport properties is performed using Green׳s function techniques within a real space renormalization scheme. In particular, we focus on the transmission probability, on the noise power of current fluctuations and on the thermopower. Our results show different transport regimes for these molecular systems as a function of the coupling intensities and the length of chains.