Multiple-q current states in a multicomponent superconducting channel

Abstract

It is well-established that multicomponent superconductors can host different nonstandard phenomena such as broken-time reversal symmetry (BTRS) states, exotic Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases, the fractional Josephson effect as well as plenty of topological defects like phase solitons, domain walls and unusual vortex structures. We show that in the case of a two-component superconducting quasi-one-dimensional channel this catalogue can be extended by a novel inhomogeneous current state, which we have termed as a multiple-momenta state or, in short, a multiple-q state, characterized by the coexistence of two different interpenetrating Cooper pair condensates with different total momenta. Within the Ginzburg-Landau formalism for a dirty two-band superconductor with sizable impurity scattering treated in the Born-approximation we reveal that under certain conditions, the occurrence of multiple-q states can induce a cascade of transitions involving switching between them and the homogeneous BTRS (non-BTRS) states and vice versa leading this way to a complex interplay of homogeneous and inhomogeneous current states. We find that hallmarks of such a multiple-q state within a thin wire or channel can be a saw-like dependence of the depairing current and the existence of two distinct stable branches on it (a bistable current state).

arXiv comment17 pages, 8 figures

References in corpus (41)

• Gap symmetry and structure of Fe-based superconductors
• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Vortices with fractional flux in two-gap superconductors and in extended Faddeev model
• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• Periodic alternating $0,\pi$-junction structures as realization of $\varphi$-Josephson junctions
• Change of pairing symmetry in the iron-based superconductor KFe2As2
• Is Sr2RuO4 a Chiral P-Wave Superconductor?
• Emerging superconductivity with broken time reversal symmetry inside a superconducting $s$-wave state
• Broken time-reversal symmetry in Josephson junction involving two-band superconductors
• Magnetic response of mesoscopic superconducting rings with two order parameters
• Ginzburg-Landau theory of Fulde-Ferrell-Larkin-Ovchinnikov states in unconventional singlet superconductors with impurities
• Flux tubes and the type-I/type-II transition in a superconductor coupled to a superfluid
• Andreev-Bashkin effect in superfluid cold gases mixture
• Current-Induced Pair Breaking in Magnesium Diboride
• Soliton states in mesoscopic two-band-superconducting cylinders
• Phase solitons in multi-band superconductors with and without time-reversal symmetry
• Proximity and Josephson effects in microstructures based on multiband superconductors
• Phase soliton and pairing symmetry of a two-band superconductor: Role of the proximity effect
• Andreev-Bashkin effect and knot solitons in interacting mixture of a charged and a neutral superfuids with possible releveance for neutron stars
• Multi-band effects on Fulde-Ferrell-Larkin-Ovchinnikov states of Pauli-limited superconductors
• Complex state induced by impurities in multiband superconductors
• Coherent current states in a two-band superconductor
• Frustration phenomena in Josephson point contacts between single-band and three-band superconductors
• Properties of dirty two-bands superconductors with repulsive interband interaction: normal modes, length scales, vortices and magnetic response
• Dc SQUID based on a three-band superconductor with broken time-reversal symmetry
• Skyrmions induced by dissipationless drag in U(1)xU(1) superconductors
• Current-carrying states in FFLO superconductors
• Fulde-Ferrell-Larkin-Ovchinnikov States in Two-Band Superconductors
• Anomalous diamagnetic response in multi-band superconductors with time-reversal broken symmetry
• Phase diagram of dirty two-band superconductors and observability of impurity-induced $s+is$ state
• Josephson currents in point contacts between dirty two-band superconductors
• Magneto-topological transitions in multicomponent superconductors
• Phase solitons and subgap excitations in two-band superconductors
• Josephson effect in two-band superconductors
• Pauli-limited upper critical field in dirty d-wave superconductors
• Phase solitons in a weakly coupled three-component superconductor
• Josephson systems based on ballistic point contacts between single-band and multi-band superconductors
• Realization of the $\pi$-state in junctions formed by multi-band superconductors with a spin-density-wave
• Frustration driven Josephson phase dynamics
• Evaluating Superconductors through Current Induced Depairing

Cited by in corpus (10)

• Pair Density Waves and Supercurrent Diode Effect in Altermagnets
• Superconductivity and pair density waves from nearest-neighbor interactions in frustrated lattice geometries
• Optically active Higgs and Leggett modes in multiband pair-density-wave superconductors with Lifshitz invariant
• Finite-momentum and field-induced pairings in orbital-singlet spin-triplet superconductors
• Examining the possibility of chiral superconductivity in Sr${}_2$RuO${}_4$ and other compounds via applied supercurrent
• Emblems of pair density waves: dual identity of topological defects and their transport signatures
• Algebraic Criterion and Graph-Theoretic Construction of Intrinsic Superconducting Diode Effects
• Finite-frequency normal and superfluid drag effects in two-component atomic Bose-Einstein condensates
• Thermodynamic Constraints on Perfect Equilibrium Superconducting Diodes
• Unconventional and anomalous magnetic field distribution in a bilayer superconductor with geometric constraints