Weak-Coupling Theory of Topological Superconductivity

The Case of Strontium Ruthenate

Nonfiction, Science & Nature, Technology, Superconductors & Superconductivity, Science, Physics, Mathematical Physics
Cover of the book Weak-Coupling Theory of Topological Superconductivity by Thomas Scaffidi, Springer International Publishing
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Author: Thomas Scaffidi ISBN: 9783319628677
Publisher: Springer International Publishing Publication: July 25, 2017
Imprint: Springer Language: English
Author: Thomas Scaffidi
ISBN: 9783319628677
Publisher: Springer International Publishing
Publication: July 25, 2017
Imprint: Springer
Language: English

This thesis sheds important new light on the puzzling properties of Strontium Ruthenate. Using a sophisticated weak-coupling approach, exact within certain limits, it shows that proper treatment of spin-orbit and multi-band effects is crucial to the physics. Based on the results of these calculations, it resolves a crucial, long-standing puzzle in the field: It demonstrates why the experimentally observed time-reversal breaking is not incompatible with the observed lack of measurable edge currents. Lastly, the thesis makes predictions for the properties of the material under uniaxial strain, which are in good agreement with recent experiments —resolving the mystery of the so-called 3K phase, and suggesting the intriguing possibility that under strain the superconductor may become conventional.

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This thesis sheds important new light on the puzzling properties of Strontium Ruthenate. Using a sophisticated weak-coupling approach, exact within certain limits, it shows that proper treatment of spin-orbit and multi-band effects is crucial to the physics. Based on the results of these calculations, it resolves a crucial, long-standing puzzle in the field: It demonstrates why the experimentally observed time-reversal breaking is not incompatible with the observed lack of measurable edge currents. Lastly, the thesis makes predictions for the properties of the material under uniaxial strain, which are in good agreement with recent experiments —resolving the mystery of the so-called 3K phase, and suggesting the intriguing possibility that under strain the superconductor may become conventional.

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