ANLYTICAL STUDY OF SINGLE MOLECULE TRANSISTOR WITH APPLICATION TO QUANTUM INTERFERENCE

In very small objects such as nanostructures and molecules, electron transport usually does not follow Ohm’s law. Several effects such as energy leakage and tunneling effects are negligible in a macroscopic conductor. But as the sizes of the conductors become comparable to nanometers, these effects become dominants. In such cases a charge carrier experiences no scattering within the conductor. The overall conductance depends upon the contact between macroscopic electrodes and the nanoscale conductor. Depending on the properties of the contact, the overall transport behavior can be very different and hence understanding the nature of the contact is extremely important in the nanoscale devices. The resistive channels of nano scale size transistor starts leaking due to quantum tunneling which affects the transport of electron in nanoscale electronic devices. The transport properties of electron have been described in the conductors of nanoscale sizes.