Two phase transitions driven by surface electron doping in WTe2
Materials’ structure and function are intimately connected, whereby one material can yield multiple emergent electronic phases when it assumes different crystal structures. We drive a structural phase transition with continuous electron doping, image the effects on electronic band structure, and provide microscopic understanding of this process via first principles calculations, hereby demonstrating a new pathway for structural phase transitions in multifunctional 2D materials such as WTe2. This is a paradigm material for realizing giant magnetoresistance, topological states, and Majorana Fermions, which are affected by fine-tuning of electronic occupation. We demonstrate how this fine tuning can stabilize unexpected structural changes.
Congratulations to Antonio!