Spin transport in a normal meta-altermagnetic superconducting nanowire junction

Abstract

Spin triplet superconductors are considered a promising platform for dissipationless spin transport, where spin currents are carried by spin triplet Cooper pairs. In this paper, we propose that the spin triplet superconductivity and spin supercurrent can be engineered in an altermagnetic superconducting nanowire, where a one-dimensional nanowire is placed on the surface of an s-wave superconductor and in proximity to the altermagnet. Using the nonequilibrium Green's function method, we demonstrate a nonzero equal spin Andreev reflection coefficient at the normal metal-altermagnetic superconducting nanowire interface, thereby verifying the injection of spin triplet Cooper pairs. Furthermore, we systematically investigate the spin transport properties in this hybrid system under a spin bias. Our results demonstrate that these properties can be effectively tuned by the chemical potential and spin bias orientation. Our proposal provides a pathway toward realizing dissipationless spin transport.

References in corpus (31)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Spin Transfer Torques
• Time Reversal Polarization and a Z_2 Adiabatic Spin Pump
• Direct observation of altermagnetic band splitting in CrSb thin films
• Proximity effect at the superconductor - topological insulator interface
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Antiferroelectric Altermagnets: Antiferroelectricity Alters Magnets
• Altermagnetic Routes to Majorana Modes in Zero Net Magnetization
• Singlet and triplet Cooper pair splitting in hybrid superconducting nanowires
• Majorana corner modes and tunable patterns in an altermagnet heterostructure
• Defect-mediated spin relaxation and dephasing in graphene
• Field-free Josephson diode effect in altermagnet/normal metal/altermagnet junctions
• Long-range spin and charge accumulation in mesoscopic superconductors with Zeeman splitting
• s+if pairing in Ising superconductors
• Classification of pair symmetries in superconductors with unconventional magnetism
• Universal spin superconducting diode effect from spin-orbit coupling
• Unconventional superconductivity in altermagnets with spin-orbit coupling
• Long-range spin imbalance in mesoscopic superconductors under a Zeeman splitting
• Non-equilibrium spin transport in Zeeman-split superconductors
• Spin Splitting Nernst Effect in Altermagnet
• Altermagnetism-Induced Parity Anomaly in Weak Topological Insulators
• Altermagnetic Proximity Effect
• Tunneling Magnetoresistance Effect in Altermagnets
• Charge and spin transport through normal lead coupled to $s$-wave superconductor and a Majorana zero mode
• Interplay of Altermagnetic Order and Wilson Mass in the Dirac Equation: Helical Edge States without Time-Reversal Symmetry
• Spin Hanle effect in mesoscopic superconductors
• Spin phase regulated spin Josephson supercurrent in topological superconductor
• Spin-flip reflection at the normal metal-spin superconductor interface
• Spin Transport in Normal Metal-Ising Superconductor Junction
• Anomalous photon-assisted tunneling in periodically driven Majorana nanowires and BCS Charge Measurement