Exchange magnetostriction in two-dimensional antiferromagnets

Jiang, Shengwei; Xie, Hongchao; Shan, Jie; Mak, Kin Fai

doi:10.1038/s41563-020-0712-x

Cited by 92 publications

(94 citation statements)

References 31 publications

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“…Moreover, both static and dynamic information can be naturally transformed to each other in C -paired SVL materials since a spin current can affect the AFM order and vice versa. In addition, the magnetoelastic coupling intrinsically exists in C -paired SVL materials, which enables the direct conversion between magnetic and mechanical properties, realizing many unique phenomena like piezomagnetism and magnetostriction and making C -paired SVL materials very useful in various sensors 35 .…”

Section: Resultsmentioning

confidence: 99%

Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current

et al. 2021

Nat Commun

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We propose a new type of spin-valley locking (SVL), named C-paired SVL, in antiferromagnetic systems, which directly connects the spin/valley space with the real space, and hence enables both static and dynamical controls of spin and valley to realize a multifunctional antiferromagnetic material. The new emergent quantum degree of freedom in the C-paired SVL is comprised of spin-polarized valleys related by a crystal symmetry instead of the time-reversal symmetry. Thus, both spin and valley can be accessed by simply breaking the corresponding crystal symmetry. Typically, one can use a strain field to induce a large net valley polarization/magnetization and use a charge current to generate a large noncollinear spin current. We predict the realization of the C-paired SVL in monolayer V2Se2O, which indeed exhibits giant piezomagnetism and can generate a large transverse spin current. Our findings provide unprecedented opportunities to integrate various controls of spin and valley with nonvolatile information storage in a single material, which is highly desirable for versatile fundamental research and device applications.

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Section: Resultsmentioning

confidence: 99%

Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current

et al. 2021

Nat Commun

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“…More broadly, light absorption and emission could be controlled electro-mechanically in nanoresonators made from custom-designed van der Waals heterostructures 60 . Going one step further, with the emergence of 2D materials featuring robust magnetic order and topological phases 61 , that can be probed using optical spectroscopy, we foresee new possibilities to explore and harness phase transitions using nanomechanical resonators based on 2D materials 62,63 .…”

Section: Discussionmentioning

confidence: 99%

Dynamically-enhanced strain in atomically thin resonators

et al. 2020

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Graphene and related two-dimensional (2D) materials associate remarkable mechanical, electronic, optical and phononic properties. As such, 2D materials are promising for hybrid systems that couple their elementary excitations (excitons, phonons) to their macroscopic mechanical modes. These built-in systems may yield enhanced strain-mediated coupling compared to bulkier architectures, e.g., comprising a single quantum emitter coupled to a nano-mechanical resonator. Here, using micro-Raman spectroscopy on pristine monolayer graphene drums, we demonstrate that the macroscopic flexural vibrations of graphene induce dynamical optical phonon softening. This softening is an unambiguous fingerprint of dynamically-induced tensile strain that reaches values up to ≈4 × 10−4 under strong non-linear driving. Such non-linearly enhanced strain exceeds the values predicted for harmonic vibrations with the same root mean square (RMS) amplitude by more than one order of magnitude. Our work holds promise for dynamical strain engineering and dynamical strain-mediated control of light-matter interactions in 2D materials and related heterostructures.

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“…[ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] In broad terms, 2DLMs represent the emerging atomically thin materials where intramolecular interactions are covalent/ionic forces, whereas the intermolecular interactions are van der Waals (vdW) forces. Inspiringly, the scientific communities have by far identified and produced a broad catalog of 2DLMs beyond graphene, represented by group 15 semiconductors, [ 18 ] nitrides, [ 7 ] transition metal dichalcogenides (TMDCs), [ 19 , 20 , 21 , 22 ] post‐transition metal chalcogenides, [ 23 , 24 ] halides, [ 25 , 26 , 27 , 28 ] multi‐elemental compounds, [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] just to name a few. Benefiting from the prominent electrostatic tunability, dangling‐bond‐free top/bottom interface, intrinsic exemption to short‐channel effects, spatially confined structures, reasonably high carrier mobility, outstanding mechanical strength, and strong interactions with light, these fascinating 2D building blocks have come under the limelight of the nano‐electronics and nano‐optoelectronics realms.…”

Section: Introductionmentioning

confidence: 99%

2D Layered Material Alloys: Synthesis and Application in Electronic and Optoelectronic Devices

Yao

Yang

2021

Advanced Science

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2D layered materials (2DLMs) have come under the limelight of scientific and engineering research and broke new ground across a broad range of disciplines in the past decade. Nevertheless, the members of stoichiometric 2DLMs are relatively limited. This renders them incompetent to fulfill the multitudinous scenarios across the breadth of electronic and optoelectronic applications since the characteristics exhibited by a specific material are relatively monotonous and limited. Inspiringly, alloying of 2DLMs can markedly broaden the 2D family through composition modulation and it has ushered a whole new research domain: 2DLM alloy nano-electronics and nano-optoelectronics. This review begins with a comprehensive survey on synthetic technologies for the production of 2DLM alloys, which include chemical vapor transport, chemical vapor deposition, pulsed-laser deposition, and molecular beam epitaxy, spanning their development, as well as, advantages and disadvantages. Then, the up-to-date advances of 2DLM alloys in electronic devices are summarized. Subsequently, the up-to-date advances of 2DLM alloys in optoelectronic devices are summarized. In the end, the ongoing challenges of this emerging field are highlighted and the future opportunities are envisioned, which aim to navigate the coming exploration and fully exert the pivotal role of 2DLMs toward the next generation of electronic and optoelectronic devices.

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Exchange magnetostriction in two-dimensional antiferromagnets

Cited by 92 publications

References 31 publications

Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current

Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current

Dynamically-enhanced strain in atomically thin resonators

2D Layered Material Alloys: Synthesis and Application in Electronic and Optoelectronic Devices

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