TY - JOUR
T1 - Tc and the elastocaloric effect of Sr2 RuO4 under ⟨110⟩ uniaxial stress
T2 - no indications of transition splitting
AU - Jerzembeck, Fabian
AU - Li, You-Sheng
AU - Palle, Grgur
AU - Hu, Zhenhai
AU - Biderang, Mehdi
AU - Kikugawa, Naoki
AU - Sokolov, Dmitry A.
AU - Ghosh, Sayak
AU - Ramshaw, Brad J.
AU - Scaffidi, Thomas
AU - Nicklas, Michael
AU - Schmalian, Jörg
AU - Mackenzie, Andrew P.
AU - Hicks, Clifford W.
N1 - Funding: This work was supported by the Max Planck Society. A.P.M. (Project No. A10) and G.P., J.S. (Project No. B01) acknowledge the financial support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) CRC TRR 288-422213477 ElastoQMat. C.W.H. acknowledges
support from the Engineering and Physical Sciences Research Council (U.K.) (EP/X012158/1). J.S. acknowledges support by a Weston Visiting Professorship at the Weizmann Institute of Science, where part of this work was performed. T.S. and M.B. acknowledge the support of NSERC, in particular the Discovery Grant (RGPIN-2020-05842), the Accelerator Supplement (RGPAS-2020-00060), and the Discovery Launch Supplement (DGECR-2020-00222). N.K. is supported by JSPS KAKENHI (No. JP18K04715, No. JP21H01033, No. JP22K19093, and No. 24K01461).
PY - 2024/8/26
Y1 - 2024/8/26
N2 - There is considerable evidence that the superconductivity of Sr2RuO4 has two components. Among this evidence is a jump in the shear elastic modulus c66 at the critical temperature Tc, observed in ultrasound measurements. Such a jump is forbidden for homogeneous single-component order parameters, and it implies that Tc should develop as a cusp under the application of shear strain with ⟨110⟩ principal axes. This shear strain should split the onset temperatures of the two components, if they coexist, or select one component if they do not. Here, we report measurements of Tc and the elastocaloric effect of Sr2RuO4 under uniaxial stress applied along the [110] lattice direction. Within experimental resolution, we resolve neither a cusp in the stress dependence of Tc, nor any second transition in the elastocaloric effect data. We show that reconciling these null results with the observed jumps in c66 requires extraordinarily fine tuning to a triple point of the Ginzburg-Landau parameter space. In addition, our results are inconsistent with homogeneous time-reversal symmetry breaking at a temperature T2≤Tc as identified in muon spin relaxation experiments.
AB - There is considerable evidence that the superconductivity of Sr2RuO4 has two components. Among this evidence is a jump in the shear elastic modulus c66 at the critical temperature Tc, observed in ultrasound measurements. Such a jump is forbidden for homogeneous single-component order parameters, and it implies that Tc should develop as a cusp under the application of shear strain with ⟨110⟩ principal axes. This shear strain should split the onset temperatures of the two components, if they coexist, or select one component if they do not. Here, we report measurements of Tc and the elastocaloric effect of Sr2RuO4 under uniaxial stress applied along the [110] lattice direction. Within experimental resolution, we resolve neither a cusp in the stress dependence of Tc, nor any second transition in the elastocaloric effect data. We show that reconciling these null results with the observed jumps in c66 requires extraordinarily fine tuning to a triple point of the Ginzburg-Landau parameter space. In addition, our results are inconsistent with homogeneous time-reversal symmetry breaking at a temperature T2≤Tc as identified in muon spin relaxation experiments.
U2 - 10.1103/physrevb.110.064514
DO - 10.1103/physrevb.110.064514
M3 - Article
SN - 1098-0121
VL - 110
JO - Physical Review. B, Condensed matter and materials physics
JF - Physical Review. B, Condensed matter and materials physics
IS - 6
M1 - 064514
ER -