Room temperature superconductivity dome at a Fano resonance in superlattices of wires

Abstract

Recently room temperature superconductivity with Tc=15 degrees Celsius has been discovered in a pressurized complex ternary hydride, CSHx, which is a carbon doped H3S alloy. The nanoscale structure of H3S is a particular realization of the 1993 patent claim of superlattice of quantum wires for room temperature superconductors where the maximum Tc occurs at the top of a superconducting dome. Here we focus on the electronic structure of materials showing nanoscale heterostructures at atomic limit made of a superlattice of quantum wires like hole doped cuprate perovskites, organics, A15 intermetallics and pressurized hydrides. We provide a perspective of the theory of room temperature multigap superconductivity in heterogeneous materials tuned at a Fano Feshbach resonance (called also shape resonance) in the superconducting gaps focusing on H3S where the maximum Tc occurs where the pressure tunes the chemical pressure near a topological Lifshitz transition. Here the superconductivity dome of Tc versus pressure is driven by both electron-phonon coupling and contact exchange interaction. We show that the Tc amplification up to room temperature is driven by the Fano Feshbach resonance between a superconducting gap in the anti-adiabatic regime and other gaps in the adiabatic regime. In these cases the Tc amplification via contact exchange interaction is the missing term in conventional multiband BCS and anisotropic Migdal-Eliashberg theories including only Cooper pairing

7 pages, 5 figures

References in corpus (10)

• Scale-free structural organization of oxygen interstitials in La2CuO4+y
• The gap amplification at a "shape resonance" in a superlattice of quantum stripes: a mechanism for high Tc
• Possible Fano resonance for high Tc multi-gap superconductivity in p-Terphenyl doped by K at the Lifshitz transition
• Intrinsic arrested nanoscale phase separation near a topological Lifshitz transition in strongly correlated two-band metals
• Study of temperature dependent atomic correlations in MgB${}_2$
• Fermi-Bose mixtures and BCS-BEC crossover in high-Tc superconductors
• Multi-Band Superconductivity and the Steep Band -- Flat Band Scenario
• Multigaps superconductivity at unconventional Lifshitz transition in a 3D Rashba heterostructure at atomic limit
• Potassium-Doped Para-Terphenyl: Structure, Electrical Transport Properties and Possible Signatures of a Superconducting Transition
• Multiple electronic components and Lifshitz transitions by oxygen wires formation in layered cuprates and nickelates

Cited by in corpus (5)

• Theory of Cross Phenomena and Their Coefficients Beyond Onsager Theorem
• Spin-orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells
• High-Tc superconducting dome in artificial heterostructures made of nanoscale quantum building blocks
• Scale free distribution of oxygen interstitials wires in optimum doped HgBa${}_2$CuO${}_{4+y}$
• Towards an effective mass model for the quasi-1D magnesium diboride superconducting nanostructures