REVIEW 7 cited by
Topological Weyl Altermagnetism in CrSb
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
Altermagnets constitute a novel, third fundamental class of collinear magnetic ordered materials, alongside with ferro- and antiferromagnets. They share with conventional antiferromagnets the feature of a vanishing net magnetization. At the same time they show a spin-splitting of electronic bands, just as in ferromagnets, caused by the atomic exchange interaction. On the other hand, topology has recently revolutionized our understanding of condensed matter physics, introducing new phases of matter classified by intrinsic topological order. Here we connect the worlds of altermagnetism and topology, showing that the electronic structure of the altermagnet CrSb is topological and hosts a novel Weyl semimetallic state. Using high-resolution and spin angleresolved photoemission spectroscopy, we observe a large momentum-dependent spin-splitting in CrSb, reaching up to 1 eV, that induces altermagnetic Weyl nodes with an associated magnetic quantum number. At the surface we observe their spin-polarized topological Fermi-arcs. This establishes that in altermagnets the large energy scale intrinsic to the spin-splitting - orders of magnitude larger than the relativistic spin-orbit coupling - creates its own realm of robust electronic topology.
Forward citations
Cited by 7 Pith papers
-
Emergent altermagnetism at surfaces of antiferromagnets: full symmetry classification and material identification
Surface termination of collinear antiferromagnets can induce altermagnetic surface states, systematically classified here and identified in 140+ MAGNDATA materials.
-
$d$-Wave Flat Fermi Surface in Altermagnets Enables Maximum Charge-to-Spin Conversion
Flat Fermi surfaces in a d-wave altermagnet enable near-total charge-to-spin conversion, with KV2O2Se predicted to reach 78% to 98% efficiency.
-
Altermagnetic polarons: the fate of alter magnetic band splittings at strong coupling
In Mott altermagnets, strong correlations replace spin-split bands with spin-momentum-locked quasiparticle weight, an observable photoemission signature.
-
Elasto-Hall conductivity and the anomalous Hall effect in altermagnets
Strain distorts the Berry curvature quadrupole of an altermagnet into a net monopole, producing an anomalous Hall effect linear in the electric field.
-
Orbital altermagnetism on the kagome lattice and possible application to $A$V$_3$Sb$_5$
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.
-
Interplay between altermagnetic order and crystal symmetry probed using magnetotransport in epitaxial altermagnet MnTe
Epitaxial MnTe films show a spontaneous anomalous Hall effect and anisotropic magnetoresistance whose angular dependence fits 2φ, 3φ, 4φ, and 6φ Fourier components, linking the transport response to the Néel vector or...
-
Symmetry, microscopy and spectroscopy signatures of altermagnetism
A review of the symmetry, microscopic origin, and detection of altermagnetism, a collinear magnetic phase with alternating spin polarization in momentum space.
Discussion (0). Continue with ORCID to comment.