Nanoelectronic Devices and Materials | Szkopek

Research

2D Atomic Crystals

Bandgap versus lattice constant for a few 2D atomic crystals.

Much of our research activity is devoted to exploring and exploiting 2D atomic crystals. Graphene, an atomic layer of carbon, is the best known 2D crystal, but there are many other monolayer materials available. As with bulk semiconductors, great versatility is achieved by tuning material composition to tune material properties. The ability to create heterostructures of 2D crystals opens the door to new electronic devices altogether. In our lab, we work on the synthesis, characterization and device applications of graphene, hydrogenated graphene, graphene oxide, and boron nitride. Much is still unknown about the electronic, thermal, optical, mechanical and chemical properties of these materials. Check out our publication list to see what we are up to!

Keeping Electronics Cool

A magnetic refrigerator made of a doped silicon substrate.

A magnetic refrigerator made from doped silicon substrate.

Heat dissipation is a major challenge for electronics, in the past, present and future. Whether it is managing the heat from a room temperature computer or keeping a quantum computer cold, heat matters. Reducing the operating voltage of transistors is one of the most promising approaches to reducing heat on a chip. We are exploring quantum mechanical tunnelling devices, such as tunnel field effect transistors, that could operate below the thermionic limit of 60mV / decade of current of conventional transistors. We are also exploring new approaches to cryogenic cooling for future quantum technologies because the techniques of refrigeration have advanced much slower than electronics. The interplay between heat and magnetism is rich and has led to the development of a new field of research: spin caloritronics. Our goal is to develop new techniques for cooling “on-chip”.