3 years ago

Anisotropic shear stress $\sigma_{xy}$ effects in the basal plane of Sr$_2$RuO$_4$.

P. Contreras, Juan Moreno

In this short note, we calculate the jumps for the specific heat C$_{\sigma_{xy}}$, the elastic compliance S$_{xyxy}^{\sigma_{xy}}$ and the thermal expansion $\alpha_{\sigma_{xy}}$ due to a shear stress $\sigma_{xy}$ in the basal plane of \sr. Henceforth we clarify some issues regarding the elastic theoretical framework suitable to explain the sound speed experiments \protect\cite{lup2}, and partially the strain experiments \protect\cite{hick,tep1} in strontium ruthenate. We continue to propose that the discontinuity in the elastic constant C$_{xyxy}$ of the tetragonal crystal \sr gives unambiguous experimental evidence that the \sr superconducting order parameter $\Psi$ has two components order parameter with a broken time-reversal symmetry state, and that the $\gamma$ band couples the anisotropic electron-phonon interaction to the $[xy]$ in-plane shear stress in \sr \protect\cite{wak1,con1}.

Publisher URL: http://arxiv.org/abs/1901.02531

DOI: arXiv:1901.02531v1

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