2D conductive metal-organic frameworks for electronics and spintronics

Song, Xiaoyu; Liu, Jingjuan; Zhang, Ting; Чэн, Лонг

doi:10.1007/s11426-020-9791-2

Cited by 42 publications

(35 citation statements)

References 94 publications

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“…Inheriting the high tunability of MOFs, 14 the electrical and magnetic properties of such organometallic ferrimagnetic semiconductors are expected to be easily enriched and modulated by changing the transition metals, organic linkers, or framework geometries, thus enabling their versatile applications in the field of emergent magnetoelectronic, magnetic sensing, and recording technologies. [15][16][17][18][19] Besides, it would also be fairly easy to integrate other functions, such as ferroelectricity, 8 ferroelasticity, 20 quantum topology, 21 photoelectricity 22 and chirality, 23,24 to prepare multifunctional magnetic semiconductors. Despite the great potentials, the development of 2D organometallic ferrimagnetic semiconductors is still at an early stage and experimental realization keeps an open question.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Liu

et al. 2021

Sci. China Chem.

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Exploring two-dimensional (2D) magnetic semiconductors with room temperature magnetic ordering and electrically controllable spin polarization is a highly desirable but challenging task for nanospintronics. Here, through first principles calculations, we propose to realize such a material by exfoliating the recently synthesized organometallic layered crystal Li0.7[Cr(pyz)2]Cl0.7•0.25(THF) (pyz = pyrazine, THF = tetrahydrofuran) [Science 370, 587 (2020)]. The feasibility of exfoliation is confirmed by the rather low exfoliation energy of 0.27 J/m 2 , even smaller than that of graphite. In exfoliated Cr(pyz)2 monolayer, each pyrazine ring grabs one electron from the Cr atom to become a radical anion, then a strong d-p direct exchange magnetic interaction emerges between Cr cations and pyrazine radicals, resulting in room temperature ferrimagnetism with a Curie temperature of 342 K. Moreover, Cr(pyz)2 monolayer is revealed to be an intrinsic bipolar magnetic semiconductor where electrical doping can induce half-metallic conduction with controllable spinpolarization direction.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Liu

et al. 2021

Sci. China Chem.

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“…In recent years, spintronics, which uses electron spin to transmit and process information, has developed vigorously due to its great advantages of fast data processing and low energy consumption. − Two-dimensional (2D) materials with room temperature ferromagnetism are crucial in developing practical nanospintronic devices, which however remain a big challenge. Up to now, only a few 2D materials have been confirmed experimentally to be ferromagnetic around 300 K, such as 2D films of VTe 2 and VSe 2 . , Through electrical gating, the ferromagnetic Curie temperature T c of 2D Fe 3 GeTe 2 can be enhanced to room temperature .…”

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confidence: 99%

Thickness Dependent Magnetic Transition in Few Layer 1T Phase CrTe₂

Gao

Yang

2021

J. Phys. Chem. Lett.

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Room temperature two-dimensional (2D) ferromagnetism is highly desired in practical spintronics applications. Recently, 1T phase CrTe2 (1T-CrTe2) nanosheets with five and thicker layers have been successfully synthesized, which all exhibit the properties of ferromagnetic (FM) metals with Curie temperatures around 305 K. However, whether the ferromagnetism therein can be maintained when continuously reducing the nanosheet's thickness to monolayer limit remains unknown. Here, through firstprinciples calculations, we explore the evolution of magnetic properties of 1 to 6 layers CrTe2 nanosheets and several interesting points are found: First, unexpectedly, monolayer CrTe2 prefers a zigzag antiferromagnetic (AFM) state with its energy much lower than that of FM state. Second, in 2 to 4 layers CrTe2, both the intralayer and interlayer magnetic coupling are AFM. Last, when the number of layers is equal to or greater than five, the intralayer and interlayer magnetic coupling become FM. Theoretical analysis reveals that the in-plane lattice contraction of few layer CrTe2 compared to bulk is the main factor producing intralayer AFM-FM magnetic transition. At the same time, as long as the intralayer coupling gets FM, the interlayer coupling will concomitantly switch from AFM to FM. Such highly thickness dependent magnetism provides a new perspective to control the magnetic properties of 2D materials.

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“…As numerous synthesized MOF magnets have been reported with recent findings of the impressively improved electrical conductivity of 2D MOFs, MOFs start to be in limelight for their application in spintronics to develop the next‐generation spin controllable electronic devices for reducing power consumption, fast data process, and massive data storage 66 . Weak spin‐orbit coupling owing to relatively light atoms of ligands in the newly developed MOFs permits a long‐lifetime of polarized spin alignment.…”

Section: Discussionmentioning

confidence: 99%

The Magnetism of Metal–Organic Frameworks for Spintronics

Lee

Park

Song

et al. 2021

Bulletin Korean Chem Soc

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Metal–organic frameworks (MOFs) consist of metal nodes and organic linkers by coordinative bonding, which have diverse and fascinating applications including gas storage/separation, catalysis, sensor, and so on. Recent achievements in enhancing MOFs' electrical conductivity have lead MOFs to be also applied toward electronic and energy devices. MOF magnets have been also developed in conjunction with the improved electrical conductivity, and MOFs have been in the limelight as attractive materials for spintronics, which is an emerging field for next‐generation nanoelectronics to reduce their power consumption and increase memory‐processing capabilities. Thanks to the MOFs' chemically tunable porous structures and rationally designable structures with strong p‐d hybridization, MOFs can be a significant component in spintronic devices to support long‐lifetime and long‐range alignment of spin‐polarized electrons. This account gives an overview of the magnetism of MOFs and the recent progress in developing MOFs‐based spintronics, and the challenges and future perspectives of MOF‐based spintronics are discussed.

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2D conductive metal-organic frameworks for electronics and spintronics

Cited by 42 publications

References 94 publications

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Thickness Dependent Magnetic Transition in Few Layer 1T Phase CrTe₂

The Magnetism of Metal–Organic Frameworks for Spintronics

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2D conductive metal-organic frameworks for electronics and spintronics

Cited by 42 publications

References 94 publications

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Two-dimensional bipolar magnetic semiconductors with high Curie-temperature and electrically controllable spin polarization realized in exfoliated Cr(pyrazine)2 monolayers

Thickness Dependent Magnetic Transition in Few Layer 1T Phase CrTe2

The Magnetism of Metal–Organic Frameworks for Spintronics

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Thickness Dependent Magnetic Transition in Few Layer 1T Phase CrTe₂