Irián Sánchez-Ramírez

May 5, 2023 | link.aps.org | Maia G. Vergniory |Claudia Felser |Fernando de Juan |Irián Sánchez-Ramírez

Abstract Among the quasi-one-dimensional transition metal tetrachalcogenides (MSe4)nI (M=Nb,Ta), the n=3 compounds are the only ones not displaying charge density waves. Instead, they show structural transitions with puzzling transport behavior. They are semiconductors at the lowest temperatures, but their transport gaps are significantly smaller than those inferred from angle-resolved photoemission spectroscopy (ARPES) and optical conductivity.