Two-dimensional ferromagnetic semiconductors of rare-earth Janus 2H-GdIBr monolayers with large valley polarization

Li, Cunquan; An, Yukai

doi:10.1039/d2nr06654h

Cited by 10 publications

(1 citation statement)

References 61 publications

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“…Based on these findings, researchers have successfully synthesized two-dimensional FM materials like monolayer CrI 3 and bilayer Cr 2 Ge 2 Te. , However, their Curie temperatures ( T C ) are only 45 and 28 K, respectively, which are far below room temperature. 2D FM materials with high T C are still the focus of research. − …”

Section: Introductionmentioning

confidence: 99%

Magnetic–Electronic Coupling in the Strained Bilayer CrSBr

Hou,

Wang,

Sun

et al. 2023

J. Phys. Chem. C

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Recently, van der Waals layered-magnetic CrSBr has been successfully synthesized and has drawn a great amount of attention. CrSBr crystallizes in the orthorhombic symmetry group and exhibits triaxial magnetic anisotropy, which shows a strong potential for modulation. By first-principles and Monte Carlo simulations, we investigated the magnetic properties of bilayer CrSBr. We find that bilayer CrSBr tends to have different magnetic orders by altering the stacking modes. Under biaxial strain, the dislocatedly stacked bilayer CrSBr can transform from an antiferromagnetic (AFM) state to a ferromagnetic (FM) state when the biaxial compressive strain reaches −2%. As a triaxial magnetic anisotropy material, the hard magnetization axis of bilayer CrSBr changes from the x-axis to the z-axis under a compressive biaxial strain of 4% for directly stacked CrSBr. Furthermore, the magnetic-electronic coupling can affect the distribution of the spin-excitons in real space. In the FM state, the spin-up excitons are widely distributed in both the top and bottom layers. While in the AFM state, the spin-up excitons can be excited only in the bottom layer and the spin-down excitons can be excited solely in the top layer. Therefore, the distribution of the spin-excitons is coupled to the magnetic order. Based on magnetic–electronic coupling, the distribution of the spin-excitons can be modulated by either applying biaxial strain or changing the stacking modes in bilayer CrSBr.

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Section: Introductionmentioning

confidence: 99%

Magnetic–Electronic Coupling in the Strained Bilayer CrSBr

Hou,

Wang,

Sun

et al. 2023

J. Phys. Chem. C

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Emerging 2D Ferromagnetism in Graphenized GdAlSi

Averyanov,

Sokolov,

Taldenkov

et al. 2024

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Abstract2D magnets are expected to give new insights into the fundamentals of magnetism, host novel quantum phases, and foster development of ultra‐compact spintronics. However, the scarcity of 2D magnets often makes a bottleneck in the research efforts, prompting the search for new magnetic systems and synthetic routes. Here, an unconventional approach is adopted to the problem, graphenization – stabilization of layered honeycomb materials in the 2D limit. Tetragonal GdAlSi, stable in the bulk, in ultrathin films gives way to its layered counterpart – graphene‐like anionic AlSi layers coupled to Gd cations. A series of inch‐scale films of layered GdAlSi on silicon is synthesized, down to a single monolayer, by molecular beam epitaxy. Graphenization induces an easy‐plane ferromagnetic order in GdAlSi. The magnetism is controlled by low magnetic fields, revealing its 2D nature. Remarkably, it exhibits a non‐monotonic evolution with the number of monolayers. The results provide a fresh platform for research on 2D magnets by design.

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