Effects of filling, strain, and electric field on the Néel vector in antiferromagnetic CrSb

Park, In Jun; Kwon, Sohee; Lake, Roger K.

doi:10.1103/physrevb.102.224426

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…Consequently, along highsymmetry k-space paths on these planes, which are conventionally investigated by ARPES, the altermagnetic band splitting is absent. Along these spin degenerate paths, our calculations align closely with previously reported findings 31 . In contrast, for the low-symmetry path that links Q and P, as previously discussed (Fig.…”

Section: Resultssupporting

confidence: 91%

Direct observation of altermagnetic band splitting in CrSb thin films

Reimers,

Odenbreit,

Šmejkal

et al. 2024

Nat Commun

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Altermagnetism represents an emergent collinear magnetic phase with compensated order and an unconventional alternating even-parity wave spin order in the non-relativistic band structure. We investigate directly this unconventional band splitting near the Fermi energy through spin-integrated soft X-ray angular resolved photoemission spectroscopy. The experimentally obtained angle-dependent photoemission intensity, acquired from epitaxial thin films of the predicted altermagnet CrSb, demonstrates robust agreement with the corresponding band structure calculations. In particular, we observe the distinctive splitting of an electronic band on a low-symmetry path in the Brilliouin zone that connects two points featuring symmetry-induced degeneracy. The measured large magnitude of the spin splitting of approximately 0.6 eV and the position of the band just below the Fermi energy underscores the significance of altermagnets for spintronics based on robust broken time reversal symmetry responses arising from exchange energy scales, akin to ferromagnets, while remaining insensitive to external magnetic fields and possessing THz dynamics, akin to antiferromagnets.

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Section: Resultssupporting

confidence: 91%

Direct observation of altermagnetic band splitting in CrSb thin films

Reimers,

Odenbreit,

Šmejkal

et al. 2024

Nat Commun

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“…The strain sensitivity of both two materials is lower than that of CrSb (32 µeV/%). [164] When the biaxial strain is up to 3-4%, the spin direction of VSi 2 N 4 rotates from inplane to outofplane state. [142,147] Additionally, substitutional doping and atomic vacancies induce the transition of nonmagnetic state in MoSi 2 N 4 to magnetic state.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…The strain sensitivity of both two materials is lower than that of CrSb (32 µeV/%). [ 164 ] When the biaxial strain is up to 3–4%, the spin direction of VSi 2 N 4 rotates from in‐plane to out‐of‐plane state. [ 142,147 ]…”

Section: Versatile Propertiesmentioning

confidence: 99%

Emerging Versatile Two‐Dimensional MoSi₂N₄ Family

Yin

Gong

Guo

2023

Adv Funct Materials

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The discovery of 2D layered MoSi 2 N 4 and WSi 2 N 4 without knowing their 3D parents by chemical vapor deposition in 2020 has stimulated extensive studies of 2D MA 2 Z 4 system due to its structural complexity and diversity as well as versatile and intriguing properties. Here, a comprehensive overview on the state-of-the-art progress of this 2D MA 2 Z 4 family is presented. Starting by describing the unique sandwich structural characteristics of the emerging monolayer MA 2 Z 4 , their versatile properties including mechanics, piezoelectricity, thermal transport, electronics, optics/optoelectronics, and magnetism is summarized and anatomized. The property tunability via strain engineering, surface functionalization and layered strategy is also elaborated. Theoretical and experimental attempts or advances in applying 2D MA 2 Z 4 to transistors, photocatalysts, batteries and gas sensors are then reviewed to show its prospective applications over a vast territory. New opportunities are further discussed and prospects are suggested for this emerging 2D family. The overview is anticipated to guide the further understanding and exploration on 2D MA 2 Z 4 .

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“…As shown in Fig. 3a, it crystallizes in the hexagonal NiAs-type structure (crystal space group P 6 3 /mmc) 49,50 . The collinear antiparallel spin arrangement corresponds to the non-trivial spin Laue group 2…”

Section: Candidate Materialsmentioning

confidence: 99%

Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries

Jungwirth¹,

Šmejkal²,

Sinova³

2021

Preprint

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The search for novel magnetic quantum phases, phenomena and functional materials has been guided by relativistic magnetic-symmetry groups in coupled spin and real space from the dawn of the field in 1950s to the modern era of topological matter. However, the magnetic groups cannot disentangle non-relativistic phases and effects, such as the recently reported unconventional spin physics in collinear antiferromagnets, from the typically weak relativistic spin-orbit coupling phenomena. Here we discover that more general spin symmetries in decoupled spin and crystal space categorize non-relativistic collinear magnetism in three phases: conventional ferromagnets and antiferromangets, and a third distinct phase combining zero net magnetization with an alternating spin-momentum locking in energy bands, which we dub "altermagnetic". For this third basic magnetic phase, which is omitted by the relativistic magnetic groups, we develop a spin-group theory describing six characteristic types of the altermagnetic spin-momentum locking. We demonstrate an extraordinary spin-splitting mechanism in altermagnetic bands originating from a local electric crystal field, which contrasts with the conventional magnetic or relativistic splitting by global magnetization or inversion asymmetry. Based on first-principles calculations, we identify altermagnetic candidates ranging from insulators and metals to a parent crystal of cuprate superconductor. Our results underpin emerging research of quantum phases and spintronics in high-temperature magnets with light elements, vanishing net magnetization, and strong spin-coherence.

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Effects of filling, strain, and electric field on the Néel vector in antiferromagnetic CrSb

Cited by 9 publications

References 68 publications

Direct observation of altermagnetic band splitting in CrSb thin films

Direct observation of altermagnetic band splitting in CrSb thin films

Emerging Versatile Two‐Dimensional MoSi₂N₄ Family

Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries

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Effects of filling, strain, and electric field on the Néel vector in antiferromagnetic CrSb

Cited by 9 publications

References 68 publications

Direct observation of altermagnetic band splitting in CrSb thin films

Direct observation of altermagnetic band splitting in CrSb thin films

Emerging Versatile Two‐Dimensional MoSi2N4 Family

Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries

Contact Info

Product

Resources

About

Emerging Versatile Two‐Dimensional MoSi₂N₄ Family