Computing the Hall conductivity of strained Sr2RuO4

Transport is an important probe of quantum materials. Recent experiments revealed an intriguing dependence of the Hall conductivity of Sr2RuO4 on uniaxial strain [1]. Using a simple tight-binding model, the behavior of the Hall number under strain was related to that of the scattering rates [1]. Here, we compare these predictions to a many-body calculation using density functional theory, dynamical-mean-field theory, and the numerical renormalization group, similarly as in Ref. [2]. We also discuss how, generally, the Hall conductivity can be computed in correlated multiband systems.

[1] P.-Y. Yang, H. M. L. Noad, M. E. Barber, N. Kikugawa, D. Sokolov, A. P. Mackenzie, C. W. Hicks, Phys. Rev. Lett. 131, 036301 (2023)

[2] F. B. Kugler, M. Zingl, H. U. R. Strand, S.-S. B. Lee, J. von Delft, A. Georges, Phys. Rev. Lett. 124, 016401 (2020)