Zero-field finite-momentum and field-induced superconductivity in altermagnets

Debmalya Chakraborty; Annica M. Black-Schaffer

doi:10.1103/PhysRevB.110.L060508

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Zero-field finite-momentum and field-induced superconductivity in altermagnets

Debmalya Chakraborty, Annica M. Black-Schaffer

DOI 10.1103/PhysRevB.110.L060508 · Physical Review B

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Abstract

We explore the possibilities for spin-singlet superconductivity in newly discovered altermagnets. Investigating d-wave altermagnets, we show that finite-momentum superconductivity can easily emerge in altermagnets even though they have no net magnetization, when the superconducting order parameter also has d-wave symmetry with nodes coinciding with the altermagnet nodes. Additionally, we find a rich phase diagram when both altermagnetism and an external magnetic field are considered, including superconductivity appearing at high magnetic fields from a parent zero-field normal state.

Source-reported materials — not catalogue approval

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