Two-dimensional altermagnets: Superconductivity in a minimal microscopic model

Bjørnulf Brekke; Arne Brataas; Asle Sudbø

doi:10.1103/PhysRevB.108.224421

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Two-dimensional altermagnets: Superconductivity in a minimal microscopic model

Bjørnulf Brekke, Arne Brataas, Asle Sudbø

DOI 10.1103/PhysRevB.108.224421 · Physical Review B

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Abstract

We propose a minimal toy model for a two-dimensional altermagnet. The model unravels altermagnetic properties at a microscopic level. We find spin-split electron and nondegenerate magnon bands with a d-wave symmetry. We use the model to explore magnon-mediated superconductivity in altermagnets. The dominant superconducting state is spin polarized with a p-wave symmetry. The state adopts its characteristics from the spin-split electron bands. Furthermore, we find that the superconducting critical temperature of altermagnets can be significantly enhanced by tuning the chemical potential.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
RuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown