Robust Superconductivity in Quasi-One-Dimensional Multiband Materials

Abstract

Recently it has been demonstrated that the pair-exchange coupling of quasi-one-dimensional (Q1D) bands with conventional higher-dimensional bands in one multiband superconducting material can result in the formation of robust aggregate pair condensate. In particular, it has been found that the Q1D thermal pair fluctuations are suppressed in the presence of deep conventional band(s), where the Fermi level is much larger than the characteristic cut-off energy. Here we report that impact of the Q1D fluctuations is significantly weakened even in the presence of nearly shallow higher-dimensional band(s), which shed new light on robust superconducting state observed in emerging chain-like-structured superconducting materials A_2Cr_3As_3 (A = K, Rb, Cs).

arXiv comment12 pages, 3 figures

References in corpus (16)

• Superconductivity in quasi-one-dimensional K${}_2$Cr${}_3$As${}_3$ with significant electron correlations
• Superconductivity in quasi-one-dimensional Cs2Cr3As3 with large interchain distance
• The gap amplification at a "shape resonance" in a superlattice of quantum stripes: a mechanism for high Tc
• Quantum Materials: Shape Resonances in Superstripes
• NMR Investigation of the Quasi One-dimensional Superconductor K${}_2$Cr${}_3$As${}_3$
• Superconductivity and Ferromagnetism in Hole-Doped RbEuFe${}_4$As${}_4$
• Electronic structure of quasi-one-dimensional superconductor K${}_2$Cr${}_3$As${}_3$ from first-principles calculations
• Shape resonances in the superconducting order parameter of ultrathin nanowires
• Screening of pair fluctuations in superconductors with coupled shallow and deep bands: a route to higher temperature superconductivity
• Quasi-one-dimensional system as a high-temperature superconductor
• Unique interplay between superconducting and ferromagnetic orders in EuRbFe${}_4$As${}_4$
• Coexistence of nontrivial topological properties and strong ferromagnetic fluctuations in $A_2$Cr${}_3$As${}_3$ ($A$=Na, K, Rb and Cs)
• Evidence of Spontaneous Vortex Ground State in An Iron-Based Ferromagnetic Superconductor
• Is there any hidden symmetry in the stripe structure of perovskite high temperature superconductors?
• Lifshitz Transition and Nontrivial H-Doping Effect in Cr-based Superconductor KCr${}_3$As${}_3$H${}_x$
• Single-Layer Di-titanium oxide Ti2O MOene: Multifunctional Promises for Electride, Anode Materials, and Superconductor

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