"Elastoconductivity as a probe of broken mirror symmetries"

Patrik Hlobil: Akash V. Maharaj, Pavan Hosur, M. C. Shapiro, I. R. Fisher, and S. Raghu; Physical Review B, 07/27/15.

Additional Authors: Akash V. Maharaj, Pavan Hosur, M. C. Shapiro, I. R. Fisher, and S. Raghu

Abstract:

We propose the possible detection of broken mirror symmetries in correlated two-dimensional materials by elastotransport measurements. Using linear response theory we calculate the“shear conductivity” Γxx,xy, defined as the linear change of the longitudinal conductivity σxx due to a shear strain εxy. This quantity can only be nonvanishing when in-plane mirror symmetries are broken and we discuss how candidate states in the cuprate pseudogap regime (e.g., various loop current or charge orders) may exhibit a finite shear conductivity. We also provide a realistic experimental protocol for detecting such a response.