Plasmon assisted superconductivity in LiTi2O4

Petocchi, Francesco; Christiansson, Viktor; Arita, Ryotaro; Werner, Philipp

doi:10.1038/s41524-026-02254-z

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Journal article

Plasmon assisted superconductivity in LiTi2O4

DOKPE

Petocchi, Francesco University of Fribourg
Christiansson, Viktor TU Wien
Arita, Ryotaro The University of Tokyo
Werner, Philipp University of Fribourg

2026

Published in:

npj Computational Materials. - Springer Science and Business Media LLC. - 2026

English We combine GW plus extended dynamical mean field theory (GW+EDMFT) with the density functional theory for superconductors (SCDFT) framework to study the electronic properties of LiTi2O4. Excellent agreement with experiment is obtained for the density of states, mass enhancement, Sommerfeld coefficient and superconducting Tc, if the dynamical nature of the screened Coulomb interaction is taken into account. Our results show that the coupling to collective charge fluctuations (plasmons) plays an important role in the pairing mechanism and explains the remarkably high Tc of this moderately correlated spinel compound.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language