Frequency-dependent superconducting states from the two-time linear response theory: Application to 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Sr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>RuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Gingras, Olivier; Georges, Antoine; Parcollet, Olivier

doi:10.1103/physrevb.110.054509

Phys. Rev. B

2024

DOI: 10.1103/physrevb.110.054509

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Frequency-dependent superconducting states from the two-time linear response theory: Application to Sr2RuO4

Olivier Gingras,

Antoine Georges,

Olivier Parcollet

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Magic angle of Sr2RuO4 : Optimizing correlation-driven superconductivity

Profe,

Rhodes,

Dürrnagel

et al. 2024

Phys. Rev. Research

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Understanding of unconventional superconductivity is crucial for engineering materials with specific order parameters or elevated superconducting transition temperatures. However, for many materials, the pairing mechanism and symmetry of the order parameter remain unclear: reliable and efficient methods of predicting the order parameter and its response to tuning parameters are lacking. Here, we investigate the response of superconductivity in Sr2RuO4 to structural distortions via the random phase approximation (RPA) and functional renormalization group (FRG), starting from realistic models of the electronic structure. Our results suggest that RPA misses the interplay of competing fluctuation channels. FRG reproduces key experimental findings. We predict a magic octahedral rotation angle, maximizing the superconducting Tc and a dominant dx2−y2 pairing symmetry. To enable experimental verification, we provide calculations of the phase-referenced Bogoliubov Quasiparticle Interference imaging. Our work demonstrates a designer approach to tuning unconventional superconductivity with relevance and applicability for a wide range of quantum materials. Published by the American Physical Society 2024

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Magic angle of Sr2RuO4 : Optimizing correlation-driven superconductivity

Profe,

Rhodes,

Dürrnagel

et al. 2024

Phys. Rev. Research

View full text Add to dashboard Cite

show abstract

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Frequency-dependent superconducting states from the two-time linear response theory: Application to Sr2RuO4

Cited by 1 publication

References 78 publications

Magic angle of Sr2RuO4 : Optimizing correlation-driven superconductivity

Magic angle of Sr2RuO4 : Optimizing correlation-driven superconductivity

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