Thermodynamic properties of a superconductor interfaced with an altermagnet
arxiv(2024)
摘要
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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