Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 81: Superconductivity: Properties and Electronic Structure
TT 81.3: Vortrag
Donnerstag, 3. April 2014, 10:00–10:15, HSZ 201
Large enhancement of the Tc of Sr2RuO4 under uni-axial strain — •Daniel O. Brodsky1, Clifford W. Hicks1,2, Edward A. Yelland1, Alexandra S. Gibbs1,3, Jan A. N. Bruin1,4, Mark E. Barber1, Stephen D. Edkins1, Keigo Nishimura5, Shingo Yonezawa5, Yoshiteru Maeno5, and Andrew P. Mackenzie1,2 — 1University of St Andrews, United Kingdom — 2Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 3The University of Tokyo, Japan — 4High Field Magnet Laboratory, Radboud University Nijmegen, Netherlands — 5Kyoto University, Japan
We present AC magnetic susceptibility data taken on samples of the spin-triplet superconductor Sr2RuO4 under uni-axial strain. To do this, we built a probe that enables us to vary the strain applied to our samples continuously from compression to tension, whilst at cryogenic temperatures. We found that Tc changes dramatically with in-plane strain: strain along the crystallographic [100] direction leads to a strong strain-symmetric response of Tc, which is pushed up from 1.35 K to 1.9 K for 0.23% strain. Conversely, the response along the [110] direction is weak and mostly linear in strain. We discuss these results in the context of the predicted px + ipy topological order parameter.