Laboratoire de Physique Théorique
Toulouse - UMR 5152

Understanding the behaviour of a correlated metal close to a nematic quantum critical point is relevant for the iron and the copper based high temperature superconductors. While this topic has been studied extensively in the past, the influence of the underlying elastic lattice as well as the influence of impurity, both of which are invariably present, are often ignored. In this talk I will discuss the qualitative modifications of the quantum critical properties that are imposed by the electron-lattice interaction, and how this physics affects superconductivity in the vicinity of the nematic quantum critical point. In the last part of the talk I will discuss how impurity scattering affects the nematic properties of electrons, and why including this physics is important to understand spectroscopy-based experimental measures of the nematic susceptibility.

References :

[1] Y. Gallais and I. Paul, C. R. Physique 17, 113 (2016).

[2] I. Paul and M. Garst, Phys. Rev. Lett. 118, 227601 (2017).

[3] D. Labat and I. Paul, Phys. Rev. B 96, 195146 (2017).