University of Birmingham > Talks@bham > Condensed Matter Physics Seminars > The superconductivity of Sr2RuO4 under uniaxial stress

The superconductivity of Sr2RuO4 under uniaxial stress

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If you have a question about this talk, please contact Mingee Chung.

Even among unconventional superconductors, the superconductivity of Sr2RuO4 is unusual. Although its critical temperature is low, at 1.5 K, this material has become a benchmark for study of condensed matter physics because it highlights how little we really know about unconventional superconductivity: although its normal state has been characterised with exceptional precision, the structure and causes of the superconducting state that emerges below 1.5 K remain mysterious. Very unusually, the superconductivity shows evidence for a spontaneous rotational sense. Since 2014, uniaxial stress experiments have opened a new route to experimentation, by allowing the lattice to be modified smoothly and reversibly, and the evolution of electronic and superconducting properties in response to be monitored. By using piezoelectric actuators to apply the stress at cryogenic temperatures, elastic strains of at least 1% can be applied, enough to induce very strong changes in the electronic structure. In this seminar I will describe present knowledge of the superconductivity of Sr2RuO4, and what we have learned through uniaxial stress experiments.

This talk is part of the Condensed Matter Physics Seminars series.

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