Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 53: Poster Session: Superconductivity 1

TT 53.8: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P2-OG2

Superconducting penetration depth measurement and zero field muon spin relaxation experiments under uniaxial strain in Sr₂RuO₄ — •Shreenanda Ghosh¹, Rajib Sarkar¹, Hubertus Luetkens², Clifford Hicks³, and Hans-Henning Klauss¹ — ¹Institute for Solid State Physics, TU Dresden, Dresden, Germany — ²Paul Scherrer Institute, Villigen, Switzerland — ³Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

We present zero-field muon spin relaxation (µSR) data on the unconventional superconductor Sr₂RuO₄ under uniaxial pressure. Results from previous µSR studies on unstressed Sr₂RuO₄ indicate a spontaneous magnetisation in the superconducting state [1], that has been associated with a time reversal symmetry breaking order parameter, p_x± ip_y.

The superconducting T_c of Sr₂RuO₄ has been shown experimentally to be sensitive to uniaxial pressure [2], so for more information about the complex superconducting order parameter, we investigate pressurized Sr₂RuO₄ by µSR. For this purpose, we have developed a dedicated device, which offers in situ uniaxial strain tuning via piezoelectric stacks.

[1] G. M. Luke et al., Nature 394, 558 (1998)

[2] C. W. Hicks et al., Science 344, 283 (2014)