Novel properties in Josephson junctions involving the cos(kx)cos(ky)-pairing state in iron-pnictides

Abstract

We propose a trilayer $\pi$-junction that takes advantage of the unconventional $s_{x^2{y}^2}=\cos k_x\cos k_y$ pairing symmetry which changes sign between electron and hole Fermi pockets in the iron pnictides. In addition, we also present theoretical results for Andreev bound states in thin superconductor-normal metal (or insulator) iron-pnictide junctions. The presence of nontrivial in-gap states, which uniquely appear in this unconventional pairing state, is a distinct feature in comparison to other singlet pairing states.

4+ pages, 4 figures, published version with improved figures and updated references

References in corpus (24)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Theory of Electron Nematic Order in LaOFeAs
• Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
• A minimal two-band model for the superconducting Fe-pnictides
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• A Numerical Renormalization Group Study of the Superconducting and Spin Density Wave Instabilities in MFeAsO${}_{1-x}$F${}_x$ Compounds
• Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
• The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
• Multiband magnetism and superconductivity in Fe-based compounds
• 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
• ${}^{75}$As NMR studies of superconducting LaO${}_{0.9}$F${}_{0.1}$FeAs
• Antiferromagnetic superexchange interactions in LaOFeAs
• Microwave Penetration Depth and Quasiparticle Conductivity in PrFeAsO_1-y Single Crystals : Evidence for a Full-Gap Superconductor
• Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
• Multiple Nodeless Superconducting Gaps in (Ba0.6K0.4)Fe2As2 Superconductor from Angle-Resolved Photoemission Spectroscopy
• Theory of the striped superconductor
• Momentum-dependence of Superconducting Gap, strong-coupling dispersion Kink, and tightly bound Cooper pairs in the high-Tc (Sr,Ba)1-x(K,Na)xFe2As2 superconductors
• Tightly-bound Cooper pair, quasiparticle kinks and clues on the pairing potential in a high Tc FeAs Superconductor
• Point-Contact Spectroscopy of Iron-Based Layered Superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs
• Experimental Consequences of the S-wave $\cos (k_x)\cdot \cos (k_y)$ Superconductivity in the Iron-Pnictides
• Andreev Bound states as a phase sensitive probe of the pairing symmetry of the iron pnictide superconductors
• Theory of Andreev reflection in junctions with iron-based High-$T_c$ superconductors

Cited by in corpus (23)

• Pairing Symmetry and Pairing State in Ferropnictides: Theoretical Overview
• Andreev spectra and subgap bound states in multiband superconductors
• Impurity-induced bound states in iron-based superconductors with s-wave cos(kx)cos(ky) pairing symmetry
• Quasiparticle Scattering Interference in Superconducting Iron-pnictides
• BaFe_{1.8}Co_{0.2}As_2 thin film hybrid Josephson junctions
• The effect of As-Chain layers in CaFeAs${}_2$
• $\pi$-junction to probe antiphase s-wave pairing in iron pnictide superconductors
• Ambegaokar-Baratoff relations of Josephson critical current in heterojunctions with multi-gap superconductors
• Odd parity pairing and nodeless anti-phase $s^{\pm }$ in Iron-Based Superconductors
• Metastable $\pi$-junction between an s${}_{\pm }$-wave and an s-wave superconductor
• Time-reversal symmetry breaking state near the surface of $s_{\pm }$-superconductor
• Proximity fingerprint of s+- superconductivity
• Josephson current and density of states in proximity circuits with s+- superconductors
• Quantum Waveguide Theory of the Josephson effect in Multiband Superconductors
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Possible pi-phase shift at interface of two pnictides with antiphase s-wave pairing
• The microscopic basis for phase-sensitive experiments for determination of the order parameter symmetry in Fe-based superconductors
• Impurity Scattering Rate and Coherence factor in Vortex Core of Sign-reversing s-wave Superconductors
• Quasiclassical circuit-theory of contiguous disordered multiband superconductors
• Order parameter sign-reversal near $s_{\pm }$-superconductor surface
• Nodeless $s$-Wave Superconducting Phases in Cuprates with Ba${}_2$CuO${}_3$-Type Structure
• Josephsonic diagnostic of competing orders in quantum critical multiband superconductors
• Effects of order parameter self-consistency in a $s_{\pm }$-s junction