Theory of heterotic SIS Josephson junctions between single- and multi-gap superconductors

Abstract

Using the functional integral method, we construct a theory of heterotic SIS Josephson junctions between single- and two-gap superconductors. The theory predicts the presence of in-phase and out-of-phase collective oscillation modes of superconducting phases. The former corresponds to the Josephson plasma mode whose frequency is drastically reduced for $\pm$ s-wave symmetry, and the latter is a counterpart of Leggett's mode in Josephson junctions. We also reveal that the critical current and the Fraunhofer pattern strongly depend on the symmetry type of the two-gap superconductor.

References in corpus (10)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
• Microwave Penetration Depth and Quasiparticle Conductivity in PrFeAsO_1-y Single Crystals : Evidence for a Full-Gap Superconductor
• Observation of Leggett's collective mode in a multi-band MgB2 superconductor
• Effective action approach to the Leggett's mode in two-band superconductors
• On the Superconductivity of LaFe1-yCoyAsO1-xFx
• Nuclear magnetic relaxation and superfluid density in Fe-pnictide superconductors: An anisotropic \pm s-wave scenario
• Novel Josephson effects between multi-gap and single-gap superconductors

Cited by in corpus (26)

• A strongly inhomogeneous superfluid in an iron-based superconductor
• BaFe_{1.8}Co_{0.2}As_2 thin film hybrid Josephson junctions
• First-Principles Study for the Anisotropy of Iron-based Superconductors toward Power and Device Applications
• Josephson effect between a two-band superconductor with the s++ or s+- pairing symmetry and a conventional s-wave superconductor
• Ground state, collective mode, phase soliton and vortex in multiband superconductors
• Ambegaokar-Baratoff relations of Josephson critical current in heterojunctions with multi-gap superconductors
• Mechanism of generation of a Josephson phase shift by an Abrikosov vortex
• Magnetic Ordering in Blocking Layer and Highly Anisotropic Electronic Structure of High-Tc Iron-based Superconductor Sr2VFeAsO3: LDA+U Studies
• Phase-sensitive evidence for the sign-reversal s+- symmetry of the order parameter in an iron-pnictide superconductor using Nb/Ba1-xNaxFe2As2 Josephson junctions
• Anomalous proximity effects at the interface of s and s+- superconductors
• Shapiro Steps as a Direct Probe of $\pm s$-wave Symmetry in Multi-gap Superconducting Josephson Junctions
• Theory of vortex structure in Josephson junctions with multiple tunneling channels: Vortex enlargement as a probe of $\pm s$-wave superconductivity
• Josephson currents in point contacts between dirty two-band superconductors
• Phase diagram of Josephson junction between s and s+- superconductors in dirty limit
• Influence of the Fermi surface geometry on a Josephson effect between an iron-pnictide and conventional superconductors
• Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode
• Josephson current and density of states in proximity circuits with s+- superconductors
• Theory of macroscopic quantum tunneling with Josephson-Leggett collective excitations in multi-band superconducting Josephson junctions
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Leggett Modes in Dirac Semimetals
• Fluxon Dynamics of a Long Josephson Junction with Two-gap Superconductors
• Atomic-scale Frustrated Josephson Coupling and Multi-condensate Visualization in FeSe
• Quasiclassical circuit-theory of contiguous disordered multiband superconductors
• Josephsonic diagnostic of competing orders in quantum critical multiband superconductors
• Two-dimensional macroscopic quantum tunneling in multi-gap superconductor Josephson junctions
• Josephson effect in point contacts between two-band superconductors