Altermagnetism in the layered intercalated transition metal dichalcogenide CoNb${}_4$Se${}_8$

Abstract

Altermagnets (AMs) are a new class of magnetic materials that combine the beneficial spintronics properties of ferromagnets and antiferromagnets, garnering significant attention recently. Here, we have identified altermagnetism in a layered intercalated transition metal diselenide, CoNb${}_4$Se${}_8$, which crystallizes with an ordered sublattice of intercalated Co atoms between NbSe${}_2$ layers. Single crystals are synthesized, and the structural characterizations are performed using single crystal diffraction and scanning tunneling microscopy. Magnetic measurements reveal easy-axis antiferromagnetism below 168 K. Density functional theory (DFT) calculations indicate that A-type antiferromagnetic ordering with easy-axis spin direction is the ground state, which is verified through single crystal neutron diffraction experiments. Electronic band structure calculations in this magnetic state display spin-split bands, confirming altermagnetism in this compound. The layered structure of CoNb${}_4$Se${}_8$ presents a promising platform for testing various predicted properties associated with altermagnetism.

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• Antiferromagnetic spintronics
• Crystal Hall effect in Collinear Antiferromagnets
• Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Broken Kramers' degeneracy in altermagnetic MnTe
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• Altermagnetic superconducting diode effect
• Observation of three-state nematicity in the triangular lattice antiferromagnet Fe${}_{1/3}$ NbS${}_2$
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• AI-accelerated Discovery of Altermagnetic Materials
• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• $\phi$ Josephson junction induced by altermagnetism
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• Enhanced Superconducting Diode Effect due to coexisting Phases
• Theory of Tunneling Spectroscopy in Unconventional $p$-wave Magnet-Superconductor Hybrid Structures
• Transport across junctions of altermagnets with normal metals and ferromagnets
• Annihilation and Control of Chiral Domain Walls with Magnetic Fields
• Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets
• Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
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• Magnetic interactions in intercalated transition metal dichalcogenides: a study based on ab initio model construction

Cited by in corpus (19)

• Strain controlled g- to d-wave transition in altermagnetic CrSb
• Phonon-mediated spin-polarized superconductivity in altermagnets
• Ferroelasticity tunable altermagnets
• Tunability of the magnetic properties in Ni intercalated transition metal dichalcogenide NbSe${}_2$
• Magnetic-field-tuned randomness in inhomogeneous altermagnets
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Viscoelastic tensor and hydrodynamics of altermagnets
• Spin-dependent quasiparticle lifetimes in altermagnets
• Inherent momentum-dependent gap structure of altermagnetic superconductors
• Odd-Parity Magnetism in Fe-Based Superconductors
• Altermagnetic Metal-Organic Frameworks
• Magnetic Frustration Enforced Electronic Reconstruction in Ni intercalated NbSe${}_2$: Suppression of Electronic Orders
• Spontaneous emergence of altermagnetism in the single-orbital extended Hubbard model
• Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators
• Growth and hydrostatic-pressure study of a type-II superconductor Bi${}_2$Ta${}_3$S${}_6$ single crystal
• Superconducting States and Intertwined Orders in Metallic Altermagnets
• Stoichiometry-Controlled Structural Order and Tunable Antiferromagnetism in ${\mathrm{Fe}}_x\mathrm{NbS}{\mathrm{e}}_2$ ($0.05\le x\le 0.38$)
• Magnetic resonance and microwave resistance modulation in van der Waals colossal-magnetoresistance material
• Second-order topological insulator induced by compensated altermagnetism without bulk spin splitting