Unveiling New Topological Phase Transitions in Helical Liquids
Helical liquids in topological materials provide a basis for topological zero modes crucial for topological quantum computing. Dr. Chen-Hsuan Hsu from the Institute of Physics has demonstrated via nonperturbative analysis that Coulomb interactions among electrons and electron-phonon coupling can induce new phase transitions between topological and trivial phases, reaching different conclusions from those of earlier perturbative studies. Considering the omnipresence of electron-electron interactions and phonons, these discoveries not only pave the way for electrically tunable topological transitions but also underscore the significant challenges in creating stable devices for topological quantum computing. This research has been published in Nanoscale Horiz. 9, 1725 (2024) and was featured on the front cover in the latest issue of the journal.
Journal Links: https://doi.org/10.1039/D4NH00254G