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From pure to mixed: Altermagnets as intrinsic symmetry-breaking indicators

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arxiv 2502.19162 v2 pith:SYLHKN2E submitted 2025-02-26 cond-mat.supr-con cond-mat.str-el

Aline Ramires This is my paper
classification cond-mat.supr-concond-mat.str-el
keywords symmetry-breakingaltermagnetsfieldsmagneticmixedpresencepurespontaneous
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abstract

We investigate the impact of the presence of altermagnetism on physical observables in the presence of explicit or spontaneous symmetry-breaking fields. We focus on unconventional superconductivity as a potential source of spontaneous symmetry-breaking fields and derive the symmetry considerations for the transmutation of altermagnets from pure to mixed, which can give rise to unusual phenomena. Based on this analysis, we put forward scenarios that could explain the apparent onset of time-reversal symmetry breaking at the superconducting critical temperature in Sr$_2$RuO$_4$, and the hidden magnetic phase and magnetic memory in 4Hb-TaS$_2$.

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Cited by 2 Pith papers

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

  1. Crossed surface flat bands in three-dimensional superconducting altermagnets

    cond-mat.supr-con 2025-10 unverdicted novelty 7.0 of 10

    In 3D chiral d-wave superconducting altermagnets, altermagnetism deforms the usual surface flat bands into crossed, topologically protected zero-energy bands whose corner count follows the altermagnetic node structure.

  2. Electric field controlled second-order anomalous Hall effect in altermagnets

    cond-mat.mes-hall 2025-10 conditional novelty 6.0 of 10

    A dc field generates a Berry-curvature-dipole-driven second-order anomalous Hall effect in Rashba-coupled hybrid altermagnets, whose magnitude can distinguish dxy from dx2-y2 order at certain dopings.

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