Speaker
Description
We report on the non-volatile control of the electronic ground state of octahedral TiSe$_{2}$ by means of electric field-driven hydrogen intercalation via ionic liquid gating. Based on measurements of electrical transport, dc magnetometry, and muon-spin rotation, we demonstrate that charge-density wave and superconductivity coexist in H$_{x}$TiSe$_{2}$ through most of the electronic phase diagram, with nearly doping-independent characteristic transition temperatures. We discuss the results of ab-initio calculations tackling the unique role of the hydrogen doping in attaining a full reconstruction of the band structure, opposed to a mere rigid electron doping of pristine TiSe$_{2}$. Emphasis will be given to the results of our $^{1}$H nuclear magnetic resonance measurements, highlighting how the low-frequency dynamical properties of the charge-density wave affect the spin-lattice relaxation of the nuclear magnetization.
[1] Piatti E., Prando G. et al., Communications Physics 6, 202 (2023)
[2] Prando G., Piatti E. et al., Physical Review Materials 7, 094002 (2023)
