Quantum-boosted functionality in single-molecule transistors

Apply now for a fully-funded PhD position in condensed matter theoretical physics, to join the Theoretical Nanoelectronics Group led by Dr Andrew Mitchell in the School of Physics at University College Dublin. The 4-year structured PhD position at UCD is funded through the prestigious ’Laureate’ programme of the Irish Research Council, and you will become an "Irish Research Council Laureate Project Scholar". The group benefits from existing collaborations with leading experimental groups.

Position to begin in Dublin in September 2018.

The project concerns quantum transport through single-molecule junctions, especially those in which strong electron interactions and/or quantum interference effects play a key role. The successful applicant will have an undergraduate degree in physics, and preferably a Masters in theoretical physics, with good ability and enthusiasm for quantum mechanics and condensed matter.

Apply by sending a cover letter, your full CV, and details of two academic referees, to [Email Address Removed]

Project abstract:
When nanoscale components are incorporated into electronic circuits, the laws of quantum mechanics govern their basic properties. Striking phenomena appear, such as entanglement and quantum interference, and have no classical analogue. The next generation of miniaturized electronics will overcome the limitations of traditional design paradigms by exploiting the novel functionality of the nano. The ultimate nanoelectronics building block -- from which to build quantum devices with advanced functionality, sensitivity, and energy efficiency -- is arguably the single-molecule transistor. In addition to embodying the extreme limit of component miniaturization, molecular electronics could utilize the incredible variety of different molecules provided by nature, exploiting their robust and reproducible chemical complexity. But what new physics can be realized in single molecule devices, and how can this be harnessed for novel functionality? Which molecules best fulfill this function? To realize the central goal of rational device design, can we formulate a theoretical framework for understanding single-molecule transistors, and develop computational tools for accurate simulation? In this IRC Laureate project, we address these basic frontier questions, building upon recent theoretical developments of the PI, and working closely with experimental molecular electronics collaborators. In particular, we will focus on the complex interplay between quantum interference due to competing transport pathways through a molecule, and entanglement from electronic interactions. We will formulate a rigorous strategy for mapping strongly interacting molecular devices to reduced models amenable to treatment with state-of-the-art numerical techniques.