Emergent phenomena in multicomponent superconductivity: an introduction to the focus issue

Abstract

Multicomponent superconductivity is a novel quantum phenomenon in many different superconducting materials, such as multiband ones in which different superconducting gaps open in different Fermi surfaces, films engineered at the atomic scale to enter the quantum confined regime, multilayers, two-dimensional electron gases at the oxide interfaces, and complex materials in which different electronic orbitals or different carriers participate in the formation of the superconducting condensate. In all these systems the increased number of degrees of freedom of the multicomponent superconducting wave-function allows for emergent quantum effects that are otherwise unattainable in single-component superconductors. In this editorial paper we introduce the present focus issue, exploring the complex but fascinating physics of multicomponent superconductivity.

3 pages; Focus Issue on Multicomponent Superconductivity of Superconductor Science and Technology. MultiSuper collaboration: http://www.multisuper.org

References in corpus (16)

• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Type-1.5 Superconductors
• The gap amplification at a "shape resonance" in a superlattice of quantum stripes: a mechanism for high Tc
• Two-band superconductors: Hidden criticality deep in the superconducting state
• Ginzburg-Landau theory for multiband superconductors: microscopic derivation
• Band-edge BCS-BEC crossover in a two-band superconductor: physical properties and detection parameters
• Conditions for non-monotonic vortex interaction in two-band superconductors
• Stability of fractional vortex states in a two-band mesoscopic superconductor
• Intrinsic arrested nanoscale phase separation near a topological Lifshitz transition in strongly correlated two-band metals
• Atypical BCS-BEC crossover induced by quantum-size effects
• Inhomogeneous multi-carrier superconductivity at LaXO3/SrTiO3 (X=Al or Ti) oxide interfaces
• Multiple-gap structure in electric-field-induced surface superconductivity
• Fluctuations in two-band superconductors in a strong magnetic field
• Coexistence of magnetic and charge order in a two-component order parameter description of the layered superconductors
• Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
• Isotropic multi-gap superconductivity in BaFe1.9Pt0.1As2 from thermal transport and spectroscopic measurements

Cited by in corpus (11)

• Evolution of multi-gap superconductivity in the atomically thin limit: Strain-enhanced three-gap superconductivity in monolayer MgB${}_2$
• Enhanced critical temperature, pairing fluctuation effects, and BCS-BEC crossover in a two-band Fermi gas
• Topological phase transitions in small mesoscopic chiral p-wave superconductors
• BCS-BEC Crossover and Pairing Fluctuations in a Two Band Superfluid/Superconductor: A T Matrix Approach
• Skyrmionic chains and lattices in $s+id$ superconductors
• Tunable BCS-BEC crossover, reentrant, and hidden quantum phase transitions in two-band superconductors with tunable valence and conduction bands
• Multiband effects on the upper critical field angular dependence of 122-family iron pnictide superconductors
• Emergent Fano-Feshbach resonance in two-band superconductors with an incipient quasi-flat band: Enhanced critical temperature evading particle-hole fluctuations
• High-Kinetic Inductance Additive Manufactured Superconducting Microwave Cavity
• Interplay of Fermi velocities and healing lengths in two-band superconductors
• Shape-resonant superconductivity in nanofilms: from weak to strong coupling