2019/01/08 by P. Contreras, Juan Moreno, Contreras, P. +1
Physics and Astronomy · #FOS: Physical sciences #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con #cond-mat.supr-con - Superconductivity
paper · pdf · doi:10.48550/arxiv.1901.02531
11 pages, for section 5: added figure 2 and figure 3 replaced. One reference and typos added. figure 4 added. arXiv admin note: text overlap with arXiv:1812.06494
arxiv created 2019/02/17 · arxiv updated 2019/02/19
In this short note, we repeat the calculations the jumps for the specific heat C_σxy, the elastic compliance Sxyxy^σxy and the thermal expansion α_σxy due to a shear stress σxy in the basal plane of Sr2RuO4. Henceforth we clarify some issues regarding the elastic theoretical framework suitable to explain the sound speed experiments of Lupien et al. (2001,2002), and partially the strain experiments of Hicks et al. (2014), and Steppke et al. (2016) in strontium ruthenate. We continue to propose that the discontinuity in the elastic constant Cxyxy of this tetragonal crystal gives unambiguous experimental evidence that the superconducting order parameter Ψ has two components with a broken time-reversal symmetry state, and that the γ band couples the anisotropic electron-phonon interaction to the [xy] in-plane shear stress according to Walker and collaborators [4] and [3]. Some importants words about the roll of the spin equal to one for the transversal phonons are added in the conclusion following Levine [34].