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How can altermagnets be used in spintronics?

Josephson effect

Andreev reflection

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Altermagnets, a unique class of magnetic materials, offer intriguing possibilities in spintronics. They induce $0$-$\pi$ oscillations in superconducting systems, distinguishing them from conventional ferromagnets and antiferromagnets. Altermagnets exhibit non-degenerate magnon modes contributing to efficient spin Seebeck and spin Nernst effects, enabling the generation of spin currents without external magnetic fields. Inelastic neutron scattering studies reveal that altermagnets display a magnetic excitation spectrum dependent on chirality, providing a probe for altermagnetism. When interfaced with superconductors, altermagnets impact Andreev reflection processes, influencing charge and spin conductance, offering voltage control over currents. These findings highlight the potential of altermagnets in spintronics for applications such as spin current generation, magnetic sensing, and superconducting device modulation.

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Open access•Posted Content•DOI Andreev reflection in altermagnets 24 Mar 2023	Altermagnets can be utilized in spintronics by influencing charge and spin conductance in Andreev reflection, offering voltage-controlled modulation of currents due to superconductivity.
Josephson effect in altermagnets Jabir Ali Ouassou, Arne Brataas, Jacob Linder - Show less +2 more 09 Jan 2023 5 Citations	Altermagnets can be utilized in spintronics by inducing 0- 𝜋 oscillations in superconducting systems, offering a unique way to tune the supercurrent via flow direction anisotropy.
Weak-Coupling Theory of Neutron Scattering as a Probe of Altermagnetism Thomas Maier, Satoshi Okamoto - Show less +1 more 07 Jul 2023	Altermagnets, with unique properties combining antiferromagnets and ferromagnets, can be utilized in spintronics by leveraging their chiral magnetic excitation spectrum probed through inelastic neutron scattering experiments.
Open access•Posted Content•DOI Josephson effect in altermagnets 09 Jan 2023	Altermagnets in spintronics offer unique Josephson effect properties, enabling tunable supercurrents through flow direction anisotropy, distinguishing them from conventional ferromagnets and antiferromagnets.
Efficient Spin Seebeck and Spin Nernst Effects of Magnons in Altermagnets Qirui Cui, Bowen Zeng, Tao Yu, Hongxin Yang, Ping Cui - Show less +4 more 15 Jun 2023	Altermagnets can be utilized in spintronics due to their efficient spin Seebeck and spin Nernst effects, enabling robust spin thermal transport without the need for external magnetic fields or Berry curvature.

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