2D Electronic Materials

Fundamental properties of 2D materials and novel device architectures

Here, we explore the exciting wealth of physics made possible by the extreme tunability and unique form factor of 2D materials, and how this can be turned into devices. At the moment we are interested in 

• Phases and Phase Transitions.

  We are exploring how electric fields, strain, and synthesis can be used to alter the phase of 2D materials. We are particularly focused on how quickly these phases can switch and whether transitions can be achieved at lower energy. With metal-semiconductor transitions in transition metal dichalcogenides, we could create more efficient memristors – components capable of both processing and storing information, akin to synapses in the brain.

• Quantum Phases at Higher Temperatures. 
  We are also very interested in engineered band structures and quantum phases, such as exciton condensates and correlated phases. Due to their flatness, 2D materials are easily modified electronically, offering full access to their immediate surroundings. This makes it possible to induce nanopatterns directly or indirectly (electrostatically). The atomically smooth, superlubricating interfaces in heterostructures enable the formation of periodic moiré potentials, which is a powerful way to introduce and manipulate ordered states in 2D materials. We are particularly focused on finding ways to scale and stabilize quantum phases for future applications.

• Magnetic Sensing
  We are developing methods to measure ultrasmall magnetic fields through geometric or topological magnetoresistance effects. Our goal is to measure brain currents. This research is part of the ongoing challenge program BIOMAG, funded by Novo Nordisk, and involves collaboration between DTU Physics, DTU Energy, and the University of Copenhagen. Key collaborators include Prof. Nini Pryds, Thomas Sand Jespersen, and Dennis Christensen from DTU Energy.

• DNA Origami as a Nanofabrication Technique
  In collaboration with researchers at Århus University and Harvard, we are working on using DNA Origami as a deterministic assembly method to connect circuits, components, and devices with atomic or base-pair precision. This work is supported by the Novo Nordisk Foundation project BioNWire, led by Prof. Kurt Gothelf in Århus University. 

• Light-Wave Physics
  An emerging area of interest is light-wave physics, where ultrashort pulses of light (e.g., THz pulses) are used to drive, manipulate, and probe electrons and phases at ultrahigh frequencies. This work is done in collaboration with Prof. Peter Uhd Jepsen at DTU Fotonik.