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Fractionalized Altermagnets: from neighboring and altermagnetic spin-liquids to spin-symmetric band splitting

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arxiv 2410.10949 v2 pith:4LFGDMAV submitted 2024-10-14 cond-mat.str-el

Fractionalized Altermagnets: from neighboring and altermagnetic spin-liquids to spin-symmetric band splitting

Jo\~ao Augusto Sobral , Subrata Mandal , Mathias S. Scheurer This is my paper
classification cond-mat.str-el
keywords altermagneticfractionalizedorderphasesaltermagnetlong-rangeneighboringorbital
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We study quantum-fluctuation-driven fractionalized phases in the vicinity of altermagnetic order. First, the long-range magnetic orders in the vicinity of collinear altermagnetism are identified; these feature a non-coplanar "orbital altermagnet" which has altermagnetic symmetries in spin-rotation invariant observables. We then describe neighboring fractionalized phases with topological order reached when quantum fluctuations destroy long-range spin order, within Schwinger-boson theory and an SU(2) gauge theory of fluctuating magnetism. Discrete symmetries remain broken in some of the fractionalized phases, with the orbital altermagnet becoming an "altermagnetic spin liquid". We compute the electronic spectral function in the doped system, which is characterized by split Fermi surfaces with preserved spin-rotation symmetry.

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Cited by 2 Pith papers

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

  1. Impact of strong electronic correlations on altermagnets: the case of NiS2

    cond-mat.str-el 2025-12 conditional novelty 6.0

    In the metallic altermagnet NiS2, dynamic correlations renormalize the altermagnetic spin splitting in a band- and energy-dependent way and give spin-up and spin-down quasiparticles markedly different lifetimes.

  2. Orbital altermagnetism on the kagome lattice and possible application to $A$V$_3$Sb$_5$

    cond-mat.str-el 2025-09 conditional novelty 6.0

    On an odd-sublattice kagome lattice, non-uniform collinear orbital moments from CDW/loop-current order can form a d-wave altermagnet with spin-split bands, as possibly realized in AV3Sb5.