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Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
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Recent developments have introduced a groundbreaking form of collinear magnetism known as "altermagnetism". This emerging magnetic phase is characterized by robust time-reversal symmetry breaking, antiparallel magnetic order, and alternating spin-splitting band structures, yet it exhibits vanishing net magnetization constrained by symmetry. Altermagnetism uniquely integrates traits previously considered mutually exclusive to conventional collinear ferromagnetism and antiferromagnetism, thereby facilitating phenomena and functionalities previously not achievable within these traditional categories of magnetism. Initially proposed theoretically, the existence of the altermagnetic phase has since been corroborated by a range of experimental studies, which have confirmed its unique properties and potential for applications. This review explores the rapidly expanding research on altermagnets, emphasizing the novel physical phenomena they manifest, methodologies for inducing altermagnetism, and promising altermagnetic materials. The goal of this review is to furnish readers with a comprehensive overview of altermagnetism and to inspire further innovative studies on altermagnetic materials which could potentially revolutionize applications in technology and materials science.
Forward citations
Cited by 7 Pith papers
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Unconventional superlattice ordering in intercalated transition metal dichalcogenide V$_{1/3}$NbS$_2$
A new ABC-stacked R3̄c polytype of V1/3NbS2 is isolated and shown to be a low-carrier-density semimetal with a proposed noncollinear 120° spin spiral, distinct from the AB-stacked altermagnetic P6322 form.
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Coulomb Drag in Altermagnets
Coulomb drag in altermagnetic bilayers is predicted to produce Hall drag and spin Hall drag without spin-orbit coupling, with orientation-dependent signatures of altermagnetism.
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Emergence and Detection of Surface altermagnetism in KV$_2$Se$_2$O
Bulk antiferromagnetic KV2Se2O is predicted to have d-wave altermagnetic surface states and a large surface nonlinear Edelstein effect that explains existing spin-splitting observations.
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Symmetry-Breaking Magneto-Optical Effects in Altermagnets
Uniaxial strain selectively breaks the symmetries that hide altermagnetism, producing detectable optical absorption and Kerr rotation that ordinary antiferromagnets do not show.
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Rational Control of Magnonic and Electronic Band Splittings
In MnF2, structural distortions along the A2u and A1g phonon modes tune and can switch off both electronic and magnon band splittings without changing the antiferromagnetic order.
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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.
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A primer on Kitaev Model: Basic aspects, material realization, and recent experiments
An elementary review of the Kitaev model's exact solution, material candidates, and experimental signatures; it contains no new research results.
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