Effects of quantum interference on the electron transport in the semiconductor$/$benzene$/$semiconductor junction

TL;DR

This study investigates how quantum interference influences electron transport in semiconductor/benzene/semiconductor junctions, revealing control mechanisms via contact positions and local gating, and analyzing anti-resonant states using Green's function methods.

Contribution

It introduces a numerical analysis of quantum interference effects on electron transmission in semiconductor-benzene junctions, highlighting control via contact geometry and gate potentials.

Findings

Quantum interference significantly affects transmission characteristics.

Contact positions and local gates can modulate electron transport.

Anti-resonant states are identified in various contact geometries.

Abstract

Using the tight-binding model and the generalized Green's function formalism, the effect of quantum interference on the electron transport through the benzene molecule in a semiconductor/benzene/semiconductor junction is numerically investigated. We show how the quantum interference sources, different contact positions and local gate, can control the transmission characteristics of the electrode/molecule/electrode junction. We also study the occurrence of anti-resonant states in the transmission probability function using a simple graphical scheme (introduced in Ref.[Phys. Chem. Chem. Phys, 2011, 13, 1431]) for different geometries of the contacts between the benzene molecule and semiconductor(silicon and titanium dioxide) electrodes.