Finite bulk Josephson currents and chirality blockade removal from inter-orbital pairing in magnetic Weyl semimetals

Abstract

Magnetic Weyl semimetals (WSMs) have been presumed to be immune to proximity-induced spin-singlet superconducting pairing due to a chirality blockade of the regular Andreev reflection. In this work we study all possible superconducting pairing induced in a WSM sandwiched between two conventional superconductors in a Josephson junction setup. We confirm that, while conventional intra-orbital $s$-wave pairing is present on the surface of the WSM, it cannot propagate into the bulk due to the chirality blockade. However, inter-orbital $s$-wave pairing, with both even-frequency spin-singlet and odd-frequency mixed-spin triplet symmetry, propagates into the bulk of the WSM, as do several $p$-wave symmetries. To demonstrate the importance of these finite inter-orbital and $p$-wave pair amplitudes in an experimental setup, we calculate the Josephson current and find a finite and even increasing current when the chirality blockade effect for the conventional intra-orbital pairing is enhanced.

arXiv comment11 pages and 6 figures; Published version

References in corpus (44)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Weyl Semimetal in a Topological Insulator Multilayer
• Topological Materials: Weyl Semimetals
• Experimental discovery of Weyl semimetal TaAs
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Discovery of a Weyl Fermion semimetal state in NbAs
• Topological response in Weyl semimetals and the chiral anomaly
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• Specular Andreev reflection in graphene
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Symmetry and Topology in Superconductors - Odd-frequency pairing and edge states -
• Experimental discovery of a topological Weyl semimetal state in TaP
• Dirac and Weyl Superconductors in Three Dimensions
• Weyl superconductors
• Odd-frequency superconductivity
• Superconductivity of doped Weyl semimetals: finite-momentum pairing and electronic analogues of the 3He-A phase
• Properties of Odd Gap Superconductors
• Fermi arc topology and interconnectivity in Weyl fermion semimetals TaAs, TaP, NbAs, and NbP
• Superconductivity in Weyl metals
• Time-reversal invariant topological superconductivity in doped Weyl semimetals
• Odd-frequency superconducting pairing in multi-band superconductors
• Crossed surface flat bands of Weyl semimetal superconductors
• Odd parity superconductivity in Weyl semimetals
• Odd-frequency superconducting pairing in topological insulators
• Robustness of odd-parity superconductivity with spin-orbit locking against disorder
• Superconductivity in Type-II Weyl Semimetals
• The Role of Odd-Frequency Pairing in Multiband Superconductors
• Superconducting proximity effect and Majorana flat bands in the surface of a Weyl semimetal
• Chirality blockade of Andreev reflection in a magnetic Weyl semimetal
• Chiral nodes and oscillations in the Josephson current in Weyl semimetals
• Odd-frequency Superconductivity in Driven Systems
• Unconventional proximity-induced superconductivity in bilayer systems
• Evolution of Pair Correlation Symmetries and Supercurrent Reversal in Tilted Weyl Semimetals
• Enhancement of crossed Andreev reflection in normal-superconductor-normal junction of thin topological insulator
• Multiple odd-frequency superconducting states in buckled quantum spin Hall insulators with time-reversal symmetry
• Signature of odd-frequency equal-spin triplet pairing in the Josephson current on the surface of Weyl nodal loop semimetals
• Induced superconductivity in Fermi arcs
• Lateral Josephson effect on the surface of Co${}_3$Sn${}_2$S${}_2$ magnetic Weyl semimetal

Cited by in corpus (19)

• Superconductivity in spin-$3/2$ systems: symmetry classification, odd-frequency pairs, and Bogoliubov Fermi surfaces
• Josephson effect in type-I Weyl Semimetals
• Dia- and paramagnetic Meissner effect from odd-frequency pairing in multi-orbital superconductors
• Odd-frequency pair density wave correlations in underdoped cuprates
• Thermoelectricity carried by proximity-induced odd-frequency pairing in ferromagnet/superconductor junctions
• Intrinsic superconducting diode effects in tilted Weyl and Dirac semimetals
• Weyl superconductor phases in a Weyl-semimetal/superconductor multilayer
• Controllable odd-frequency Cooper pairs in multi-superconductor Josephson junctions
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
• Equilibrium current in a Weyl-semimetal - superconductor heterostructure
• Signatures of interfacial topological chiral modes via RKKY exchange interaction in Dirac and Weyl systems
• Edge-induced pairing states in a Josephson junction through a spin-polarized quantum anomalous Hall insulator
• Quasiparticles-mediated thermal diode effect in Weyl Josephson junctions
• Signatures of odd-frequency pairing in the Josephson junction current noise
• Direct detection of odd-frequency superconductivity via time- and angle-resolved photoelectron fluctuation spectroscopy
• Thermoelectric properties of inversion symmetry broken Weyl semimetal-Weyl superconductor hybrid junctions
• Phase-dependent charge and heat current in thermally biased short Josephson junctions formed at helical edge states
• Symmetries of Weyl Superconductors with Different Pairings
• Coalescence of Andreev bound states on the surface of a chiral topological semimetal