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Magic angle of Sr2RuO4: Optimizing correlation-driven superconductivity
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DOI：10.1103/PhysRevResearch.6.043057.png)
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摘要
En 中文
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 d x 2 - y 2 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.
Keyword:
FUNCTIONAL RENORMALIZATION-GROUP
QUASI-PARTICLE INTERFERENCE
T-C
CONSERVING APPROXIMATIONS
COLLECTIVE DESCRIPTION
ELECTRON INTERACTIONS
PAIRING SYMMETRY
ORDER-PARAMETER
ENERGY GAPS
SPIN
期刊
IF:
4.2
论文数:
7.6K
被引数:
2.7W
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OAAI分享收藏Surface structural analysis of the layered perovskite Sr2RuO4 by LEED I(V).png)
PHYSICAL REVIEW B
PHYSICAL REVIEW BIF3.7
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分享收藏Direct observation of a uniaxial stress-driven Lifshitz transition in Sr2RuO4直接观察Sr2RuO4中单轴应力驱动的Lifshitz转变
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