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

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arxiv 2309.14427 v2 pith:VQMFE4YP submitted 2023-09-25 cond-mat.supr-con cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el

Debmalya Chakraborty , Annica M. Black-Schaffer This is my paper
classification cond-mat.supr-concond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
keywords altermagnetssuperconductivityfinite-momentummagneticnodeswavewhenzero-field
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Catalog of Altermagnetism in Magnetic Wallpaper/Space Groups and Nonsymmorphic Altermagnets

    cond-mat.mtrl-sci 2026-07 accept novelty 7.0 of 10

    Complete catalog finds 17 altermagnetic wallpaper groups and 422 space groups (including 262 non-centrosymmetric) and identifies nonsymmorphic hourglass spin-splitting patterns beyond the six established wave types.

  2. Persistent spin currents in superconducting altermagnets

    cond-mat.supr-con 2025-07 conditional novelty 7.0 of 10

    Model calculations show that superconducting altermagnets can support persistent spin-polarized and pure spin supercurrents that survive spin-orbit coupling and magnetic disorder.

  3. Proximitizing altermagnets with conventional superconductors

    cond-mat.supr-con 2025-09 conditional novelty 6.0 of 10

    Proximity coupling to an s-wave superconductor plus interfacial Rashba spin-orbit coupling induces a generically nodal mixed singlet/triplet superconducting state in a thin altermagnetic film, with 8 Dirac nodes and a...

  4. Proximity-induced superconductivity and emerging topological phases in altermagnet-based heterostructures

    cond-mat.supr-con 2025-10 unverdicted novelty 5.0 of 10

    Theoretical derivation of proximity-induced even-parity pairings in d-wave altermagnets coupled to s-wave superconductors, and emergence of weak and strong topological phases when Rashba SOC is included.

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