Molecular Electronics Theory - Solomon Group – University of Copenhagen

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Molecular Electronics Theory - Solomon Group

Understanding chemical trends in molecular electron transport

Traditionally, chemistry has involved the study of molecules in solution, the gas phase or as solid crystals. Today, nanofabrication techniques have made it possible to bind molecules in a huge array of different environments and we need to understand how different chemical functionalities influence properties like conductivity.

We are particularly interested in quantum interference effects in molecular electron transport and how simple changes in conjugation can result in dramatically different transport properties.

Local heating, dissipation and thermoelectric response of molecules in conducting junctions

As current passes through a molecule, the tunneling electrons can gain or lose energy through their interactions with the vibrational degrees of freedom. This results in an inelastic electron tunneling spectrum, a type of vibrational spectroscopy, but can also induce changes in the molecule. We are interested in how to modulate these excitation and dissipation processes with chemical modifications to the system.

Mapping transport pathways in complex systems

Structure-function relationships play a great role in the development of chemical intuition and we use local transport decomposition methods to map the transport pathways in complex systems. As molecules fluctuate, both due to thermal motion or an applied force, the conduction pathways can also fluctuate and we study which parts of a molecule actually carry the current and which parts merely control the environment.


 

Research

Understanding chemical trends in molecular electron transport

Traditionally, chemistry has involved the study of molecules in solution, the gas phase or as solid crystals. Today, nanofabrication techniques have made it possible to bind molecules in a huge array of different environments and we need to understand how different chemical functionalities influence properties like conductivity.

We are particularly interested in quantum interference effects in molecular electron transport and how simple changes in conjugation can result in dramatically different transport properties. We study the inelastic processes in these types of junctions (how the molecule is heated and dissipates this heat, while current flows) and the dynamics of the system as a force is applied to the molecule.

In all cases, our particular focus is on the chemistry of the system and the molecules involved. We want to develop an intuitive understanding of how we can use molecular functionalities to design systems with electronic properties of interest.

Major Projects

We have previously had two major projects running in the group. You can read more about the details on their respective project pages:

ERC Starting Grant Project: CHEMHEAT

Sapere Aude Project: Simulating Single Molecule Pulling Experiments

Publications

Click and read a full list of our publications.

People

Gemma C. Solomon (C.V.)
Associate Professor

E-mail: gsolomon@nano.ku.dk
Office: C304 HCØ
Phone: +45 353 20215
Address: Nano-Science Center and Department of Chemistry
Universitetsparken 5, 2100 Copenhagen Ø


Masters Students
William Bro-Jørgensen
Louise Oxen Høgh Hyllested

PhD Students
Marc Hamilton Garner

Former Group Members
Marco Vanin
Justin P. Bergfield
Olov Karlström
Kim Georg Lind Pedersen
Mikkel Strange
Falco Hüser
Tim Hansen
Anders Borges
Jacob Lykkebo Jørgensen
Qian Li
Chengjun Jin
Alessandro Pirrotta
Kasper Lauritzen
Anders Jensen

Positions available

At this point in time, we have no open positions, but email enquiries are always welcome.

There are also a number of funding schemes available for funding postdoctoral positions in Denmark and we are happy to collaborate in writing applications for funding.