Ryan Lee L&S Sciences
Thermal Metal-Insulator Transition in Single Layer 1T-TaSe2
Understanding the nature of insulating behavior in solids has long been an important problem in condensed matter physics and materials science. It is unclear how the electrons in many materials behave in their environment, where an atomic lattice and other electrons play a role in shaping their mechanics. As the use of insulators is commonplace, explaining their behavior will help us apply them in even more ways. Understanding the behavior of electrons in an insulator can additionally answer fundamental questions in physics, especially with regards to the quantum mechanics of interacting electrons.In materials called Mott insulators, which are materials expected to be metals in conventional theory but turn out to be insulating, thermal metal-insulator phase transitions have been theoretically predicted but are very rarely observed, making them poorly understood. Such phase transitions are typically accompanied by significant changes in the electronic structure of the material. By studying the electronic structure of a Mott insulator at different temperatures, electron mechanics, electronic phase transitions, and insulating behavior in materials can be better understood.