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Spin orientation by electric current in altermagnets

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arxiv 2503.12203 v1 pith:XJXTACD4 submitted 2025-03-15 cond-mat.mes-hall quant-ph

L. E. Golub , L. Šmejkal This is my paper · ORCID
classification cond-mat.mes-hallquant-ph
keywords currentspinaltermagnetsorientationangularbrokendirectionelectric
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abstract

It is shown that the flow of electric current in an altermagnet results in the formation of a homogeneous electron spin orientation in the sample. The spin of the conduction electrons generated in altermagnets with $d$-wave spin-momentum couplings, is quadratic in the current magnitude, varies as the second angular harmonic under variation of the current direction and does not require broken inversion symmetry. The effect is thus distinct from conventional current induced spin polarization phenomena which are linear in the current, vary as a first angular harmonic under variation of current direction and require broken inversion symmetry. The current-induced spin orientation in altermagnets is obtained using the kinetic theory for distribution functions in the spin-splitted subbands. It is shown that an application of external magnetic field significantly enhances the electron spin.

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Cited by 3 Pith papers

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

  1. Edge spin galvanic effect in altermagnets

    cond-mat.mes-hall 2025-12 accept novelty 6.0 of 10

    Spin polarization in a d-wave altermagnet drives an electric edge current that reverses with spin or Néel vector direction; polarized light creates a pure spin edge photocurrent convertible to charge by a magnetic field.

  2. G-type Antiferromagnetic BiFeO$_3$ is a Multiferroic $g$-wave Altermagnet

    cond-mat.mtrl-sci 2025-05 conditional novelty 6.0 of 10

    G-type antiferromagnetic BiFeO3 is classified as a bulk g-wave altermagnet with spin splitting up to about 0.2 eV, using a completed group-theory table for (d,g,i)-wave altermagnets.

  3. Spin-polarized electron transport for the altermagnet CrSb

    cond-mat.mes-hall 2026-07 conditional novelty 5.5 of 10

    Ferromagnetic Ni contacts enable anomalous and nonlinear Hall effects in centrosymmetric CrSb, with Hall-slope sign inversion and bow-tie hysteresis attributed to bulk altermagnetism plus topological surface states.

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