Inverse proximity effect in thin-film superconductor/magnet heterostructures with metallic and insulating magnets
arXiv:2510.18102 · doi:10.1103/2hdv-4b2x
Abstract
Proximity effect in thin-film superconductor (S)/magnet heterostructures with different types of magnets including ferromagnets, antiferromagnets and altermagnets is widely considered in the framework of an effective model, where the heterostructure is replaced by a homogeneous superconductor in the presence of a homogeneous exchange field of a corresponding type. Here we study the extent to which such a model is actually applicable to ballistic thin-film superconductor/magnetic heterostructures. In particular, a comparative analysis of thin-film superconductor/magnetic metal and superconductor/magnetic insulator heterostructures is performed. Metallic and insulating ferromagnets (FM, FI) and altermagnets (AM, AI) are considered. It is shown that in the S/FI and S/AI heterostructures the the proximity effect creates a well-defined spin splitting of the electronic spectra in the S layer. Thus, they are well described by the effective model. At the same time, the proximity effect in S/FM and S/AM heterostructures also creates a spin splitting of the spectra of the S layer, but it has a chaotic spectral and spatial distribution and unpredictable amplitude and, in general, cannot be detected via the spin splitting of the superconducting density of states. Thus, the effective model is not applicable to such heterostructures. Nevertheless, we demonstrate that they support well-pronounced triplet correlations and, thus, can be used for spintronics applications.
References in corpus (22)
- dc Josephson Effect in Altermagnets
- Evidence for Triplet Superconductivity in a Superconductor-Ferromagnet Spin Valve
- Finite-momentum Cooper pairing in proximitized altermagnets
- Nonlocal Thermoelectric Effects and Nonlocal Onsager Relations in a Three-Terminal Proximity-Coupled Superconductor-Ferromagnet Device
- Triplet proximity effect in FSF trilayers
- Andreev reflection at the altermagnet-superconductor interface
- Phase-shifted Andreev levels in an altermagnet Josephson junction
- Altermagnetic superconducting diode effect
- Majorana corner modes and tunable patterns in an altermagnet heterostructure
- Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
- Angular dependence of superconductivity in superconductor / spin valve heterostructures
- Spin-polarized quasiparticle transport in exchange-split superconducting aluminum on europium sulfide
- Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
- Néel proximity effect at antiferromagnet/superconductor interfaces
- Tunneling Conductance and Spin Transport in Clean Ferromagnet-Ferromagnet-Superconductor Heterostructures
- Proximity effect in superconductor/antiferromagnet hybrids: Neel triplets and impurity suppression of superconductivity
- Quantum transport theory for unconventional magnets: Interplay of altermagnetism and p-wave magnetism with superconductivity
- Transport in Ferromagnet/Superconductor spin valves
- Gate-controlled proximity effect in superconductor/ferromagnet van der Waals heterostructures
- Impurity states in altermagnetic superconductors
- Magnetic proximity effect in superconductor/ferromagnet van der Waals heterostructures: dependence on the number of superconducting monolayers
- Thermodynamic properties of a superconductor interfaced with an altermagnet
Cited by in corpus (3)
- Interplay between Superconductivity and Altermagnetism in Disordered Materials and Heterostructures
- Gate-Tunable Superconducting Spin Valve in a van der Waals Ferromagnet/Superconductor/Ferromagnet Trilayer
- Hybrid collective excitations in topological superconductor/ferromagnetic insulator heterostructures