Spin valve effect in two-dimensional VSe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e140" altimg="si14.svg"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> system

Jafari, Mirali; Wawrzyniak-Adamczewska, Małgorzata; Stagraczyński, S.; Dyrdał, A.; Barnaś, J.

doi:10.1016/j.jmmm.2021.168921

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…On the contrary, for VSe 2 and VTe 2 , we found that magnetic moments of the two V atomic planes are arranged antiferromagnetically in the ground state, i.e. the interlayer exchange coupling is antiferromagnetic, in agreement with other works 9,[15][16][17][18] .…”

Section: Electronic Bandstructuresupporting

confidence: 91%

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Electronic and magnetic properties of 2D vanadium-based transition metal dichalcogenides

Jafari,

Rudziński,

Barnaś

et al. 2023

Sci Rep

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In this paper, electronic and magnetic properties of monolayers and bilayers of Vanadium-based transition metal dichalcogenides VX2 (X = S, Se, Te) in the H phase are investigated theoretically using methods based on DFT calculations as well as analytical methods based on effective spin Hamiltonians. The band structure has been computed for all systems, and then the results have been used to determine exchange parameters and magnetic anisotropy constants. These parameters are subsequently used for the determination of the Curie temperatures, hysteresis curves, and energy of spin-wave excitations. In the latter case, we compare analytical results based on effective spin Hamiltonian with those determined numerically by Quantum ATK software and find a good agreement. The determined Curie temperature for VTe2 monolayers and bilayers is below the room temperature (especially that for bilayers), while for the other two materials, i.e. for VS2 and VSe2, it is above the room temperature, in agreement with available experimental data.

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Section: Electronic Bandstructuresupporting

confidence: 91%

“…While there are several theoretical studies on the monolayers and bilayers of VX 2 materials in the 2H phase 8 , 9 , and these materials were successfully synthesized in the bulk and multilayer forms 6 , VSe 2 and VTe 2 in the trigonal (1T) phase have been synthesized only in the monolayer form. 10 – 13 .…”

Section: Introductionmentioning

confidence: 99%

Electronic and magnetic properties of 2D vanadium-based transition metal dichalcogenides

Jafari,

Rudziński,

Barnaś

et al. 2023

Sci Rep

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show abstract

“…Even though most of the research on two-dimensional structures has been carried out on graphene, it is not the only 2D material. Following graphene, many other two-dimensional graphene-like materials have been synthesized, such as, for instance, silicene, hexagonal boron nitride (h-BN), transition metal dichalcogenides (TMDs), oxides, and carbides [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. It is also worth noting that most 2D materials occur in mono-layer as well as multi-layer forms [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

First Principle Study on Electronic and Transport Properties of Finite-Length Nanoribbons and Nanodiscs for Selected Two-Dimensional Materials

Jafari

Dyrdał

2022

Molecules

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Using the density functional theory, we calculate electronic states of various nanoribbons and nanodiscs formed from selected two-dimensional materials, such as graphene, silicene, and hexagonal boron nitride. The main objective of the analysis is a search for zero-energy states in such systems, which is an important issue as their presence indicates certain topological properties associated with chirality. The analysis is also supported by calculating transport properties.

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“…CPP charge transport and MR effect in VSe 2 multilayers has attracted significant theoretical attention in recent years [24][25][26][27][28]. This is motivated by the fact that bilayer VSe 2 in 2H (trigonal prismatic) phase is an A-type antiferromagnetic vdWs crystal i.e.…”

Section: Introductionmentioning

confidence: 99%

Thermally-driven large current-perpendicular-to-plane magnetoresistance in ultrathin flakes of vanadium diselenide

Firouzeh

Rahman

Pramanik

2022

J. Phys.: Condens. Matter

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Current-perpendicular-to-plane magnetoresistance (CPP MR) in layered heterojunctions is at the heart of modern magnetic field sensing and data storage technologies. Van der waals heterostructures and two-dimensional (2D) magnets opened a new playground for exploring this effect, although most 2D magnets exhibit large CPP MR only at very low temperatures due to their very low Curie temperatures. Vanadium diselenide (VSe2) is a promising material since its monolayers can potentially act as room temperature ferromagnets. VSe2 multilayers have been predicted to exhibit CPP MR effects, although experimental work in this area remains scarce. In this work we investigate CPP MR in 1T-VSe2 ultrathin flakes, revealing a large (~60–70%), positive, linear, and non saturating CPP MR, which persists close to room temperature (~250K), in a relatively small magnetic field range of ± 12 kG. The CPP MR has been found to increase with decreasing flake thickness. The CPP MR originates due to the intrinsic inhomogeneity in the CPP transport path, and exhibits unprecedented immunity against thermal fluctuations, leading to increasingly enhanced MR as temperature is increased, even significantly beyond the CDW (charge density wave) transition temperature. The observed “thermally-driven” MR features are remarkably robust and reproducible, and can offer a viable route for developing practical room temperature 2D based magnetic sensor technologies. Our results also suggest that harnessing similar effects in other 2D systems could generate large MR as well, thereby motivating further research on CPP transport in these systems, which has been relatively unexplored so far.

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Spin valve effect in two-dimensional VSe2 system

Cited by 6 publications

References 41 publications

Electronic and magnetic properties of 2D vanadium-based transition metal dichalcogenides

Electronic and magnetic properties of 2D vanadium-based transition metal dichalcogenides

First Principle Study on Electronic and Transport Properties of Finite-Length Nanoribbons and Nanodiscs for Selected Two-Dimensional Materials

Thermally-driven large current-perpendicular-to-plane magnetoresistance in ultrathin flakes of vanadium diselenide

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