Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4
npj Quantum Materials, vol. 9
Abstract
Abstract The pairing symmetry of Sr2RuO4 is a long-standing fundamental question in the physics of superconducting materials with strong electronic correlations. We use the functional renormalization group to investigate the behavior of superconductivity under uniaxial strain in a two-dimensional realistic model of Sr2RuO4 obtained with density functional theory and incorporating the effect of spin-orbit coupling. We find a dominant $${d}_{{{{{\rm{x}}}}}^{2}-{{{{\rm{y}}}}}^{2}}$$ d x 2 − y 2 superconductor mostly hosted by the dxy-orbital, with no other closely competing superconducting state. Within this framework, we reproduce the experimentally observed enhancement of the critical temperature under strain and propose a simple mechanism driven by the density of states to explain our findings. We also investigate the competition between superconductivity and spin-density wave ordering as a function of interaction strength. By comparing theory and experiment, we discuss constraints on a possible degenerate partner of the $${d}_{{{{{\rm{x}}}}}^{2}-{{{{\rm{y}}}}}^{2}}$$ d x 2 − y 2 superconducting state.
Authors 5
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RWTH Aachen University · Flatiron Institute
Affiliation as printed
Center for Computational Quantum Physics, Flatiron Institute, 162 Fifth Avenue, New York, NY, 10010, USA
Institute for Theoretical Solid State Physics, RWTH Aachen University and JARA Fundamentals of Future Information Technology, 52062, Aachen, Germany
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Affiliation as printed
Center for Computational Quantum Physics, Flatiron Institute, 162 Fifth Avenue, New York, NY, 10010, USA
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RWTH Aachen University · Max Planck Institute for the Structure and Dynamics of Matter · Center for Free-Electron Laser Science
Affiliation as printed
Institute for Theoretical Solid State Physics, RWTH Aachen University and JARA Fundamentals of Future Information Technology, 52062, Aachen, Germany
Max Planck Institute for the Structure and Dynamics of Matter and Center Free-Electron Laser Science, Hamburg, Germany
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Centre National de la Recherche Scientifique · Université Paris Sciences et Lettres · University of Geneva · École Polytechnique · Flatiron Institute · Collège de France · Centre de Physique Théorique · Institut Polytechnique de Paris
Affiliation as printed
Center for Computational Quantum Physics, Flatiron Institute, 162 Fifth Avenue, New York, NY, 10010, USA
Centre de Physique Théorique, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau Cedex, France
Collège de France, Université PSL, 11 Place Marcelin Berthelot, 75005, Paris, France
DQMP, Université de Genève, 24 Quai Ernest Ansermet, 1211, Genève, Suisse
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Affiliation as printed
Center for Computational Quantum Physics, Flatiron Institute, 162 Fifth Avenue, New York, NY, 10010, USA
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