Theory of Tunneling Spectroscopy in Unconventional $p$-wave Magnet-Superconductor Hybrid Structures

Abstract

We theoretically study the tunneling conductance of a junction consisting of a two-dimensional unconventional $p$-wave magnet (UPM) and a superconductor (SC) for various pairing symmetries. The zero bias conductance peaks arising from the dispersionless surface Andreev bound states (SABSs) in $d_{xy}$-wave and $p_x$-wave superconductor junctions are insensitive against varying the magnetic spin-splitting strength ${\alpha }_y$. Moreover, for chiral $p$- or chiral $d$-wave SCs, zero bias conductance shows a non-monotonic change as a function of ${\alpha }_y$ indicating the existence of the dispersive SABSs. Our obtained results of tunneling spectroscopy based on a UPM serve as an effective way for the identification of the pairing symmetries of unconventional superconductors. It is noted that our used Hamiltonian of UPM is also available for persistent spin helix systems.

38 pages, 23 figures

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• Josephson effect and odd-frequency pairing in superconducting junctions with unconventional magnets
• Metallic $p$-wave magnet with commensurate spin helix
• Classification of pair symmetries in superconductors with unconventional magnetism
• Impurity-induced Friedel oscillations in altermagnets and $p$-wave magnets
• Pair Density Waves and Supercurrent Diode Effect in Altermagnets
• Orientation-dependent transport in junctions formed by $d$-wave altermagnets and $d$-wave superconductors
• All-electrically controlled spintronics in altermagnetic heterostructures
• Coexistence of $p$-wave magnetism and superconductivity
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• Topological insulators and superconductors based on $p$-wave magnets,electrical control and detection of a domain wall
• Transverse Spin current at the normal/p-wave magnet junctions
• Floquet engineering spin triplet states in unconventional magnets
• Out-of-plane Edelstein effects: Electric-field induced magnetization in $p$-wave magnets
• Purely electrical detection of the spin-splitting vector in $p$-wave magnets based on linear and nonlinear conductivities
• Pseudo-Ising superconductivity induced by $p$-wave magnetism
• Andreev bound states and supercurrent in an unconventional superconductor-altermagnetic Josephson junction
• Unconventional superconductivity of an altermagnetic metal: Polarized BCS and inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov states
• Tunneling conductance in superconducting junctions with $p$-wave unconventional magnets breaking time-reversal symmetry
• Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets
• Quantum Lifshitz points in an altermagnetic metal
• Higher-order bulk photovoltaic effects, quantum geometry and application to $p$-wave magnets
• Proximity effect and p-wave superconductivity in s-wave superconductor/helimagnet heterostructures
• Engineering subgap states in superconductors by the symmetry of altermagnetism
• Josephson diode and spin-valve effects on the surface of altermagnet CrSb
• Sub-spin-flop switching of a fully compensated antiferromagnet by magnetic field
• Altermagnetism Induced Bogoliubov Fermi Surfaces Form Topological Superconductivity
• Time reversal reserved spin valve and spin transistor based on unconventional $p$-wave magnets