Electron transmission through molecules and molecular interfaces

Area of Science:

• Condensed Matter Physics
• Materials Science
• Physical Chemistry

Background:

• Electron transfer is crucial for scanning tunneling microscopy and molecular bridges.
• Molecules are now viewed as conductors in molecular junctions, replacing traditional donor-acceptor models.
• Molecular electronics investigates single molecules or assemblies as conductors.

Purpose of the Study:

• To review current knowledge and theoretical understanding of electron transmission through molecules.
• To discuss various computational approaches for molecular conduction properties.
• To analyze the impact of inelastic processes, dephasing, and thermal relaxation.

Main Methods:

• Review of theoretical approaches for computing molecular conduction.
• Analysis of static-junction models.
• Discussion of inelastic processes, dephasing, and thermal relaxation effects.
• Examination of electron transmission through water layers.
• Exploration of overbarrier transmission phenomena.

Main Results:

• Different theoretical methods for calculating molecular conduction properties are presented and compared.
• The influence of inelastic scattering, dephasing, and thermal relaxation on electron transport is detailed.
• Current theoretical understanding of electron transmission through water interfaces is summarized.
• Overbarrier transmission mechanisms are discussed in the context of molecular layers.

Conclusions:

• Theoretical frameworks for understanding electron transport in molecular junctions are evolving.
• Inelastic processes and environmental interactions significantly affect molecular conductivity.
• Further research is needed to fully elucidate electron transmission through diverse molecular systems and interfaces.