Fernando de Juan

Jun 2, 2023 | nature.com | Fernando de Juan

AbstractChemical substitution is a promising route for the exploration of a rich variety of doping- and/or disorder-dependent collective phenomena in low-dimensional quantum materials. Here we show that transition metal dichalcogenide alloys are ideal platforms to this purpose. In particular, we demonstrate the emergence of superconductivity in the otherwise metallic single-layer TaSe2 by minute electron doping provided by substitutional W atoms.

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.