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Thermodynamic properties of a superconductor interfaced with an altermagnet

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arxiv 2403.10456 v1 pith:CLGDHKH4 submitted 2024-03-15 cond-mat.supr-con cond-mat.mes-hall

Simran Chourasia , Aleksandr Svetogorov , Akashdeep Kamra , Wolfgang Belzig This is my paper · ORCID
classification cond-mat.supr-concond-mat.mes-hall
keywords fieldmagneticbilayerexternalmagnetizationsuperconductorsystemaltermagnet
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Recently introduced magnetic materials called altermagnets (AM) feature zero net magnetization but a momentum dependent magnetic exchange field, which can have intriguing implications when combined with superconductivity. In our work, we use the quasiclassical framework to study the effects of such a material on a conventional superconductor (S) in an AM/S bilayer. We discuss the superconducting phase diagram and heat capacity of AM/S while making a comparison with a ferromagnet-superconductor bilayer. Furthermore, we examine the density of states and analyze the system's response to an external magnetic field. We illustrate the anisotropy of spin-susceptibility and magnetization of AM/S by considering an external field in the in-plane and out-of-plane direction, thereby facilitating the scope of experimental detection and characterization of an AM in an AM/S hybrid system.

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  1. Majorana flat bands and anomalous proximity effects in $p$-wave magnet--superconductor hybrid systems

    cond-mat.supr-con 2025-02 accept novelty 6.0 of 10

    A two-dimensional hybrid of an s-wave superconductor and a p-wave magnet hosts chiral-symmetry-protected flat-band Majorana bound states and a disorder-robust quantized zero-bias conductance peak.

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