Indirect RKKY interaction between localized magnetic moments in armchair graphene nanoribbons

Szałowski, K.

doi:10.1088/0953-8984/25/16/166001

Cited by 21 publications

(24 citation statements)

References 65 publications

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“…The most common places are: on top of a lattice site (onsite), on the line between two lattice sites (bridge), in hollow sites (plaquette), or substitutional. The onsite hybridization has been studied extensively in infinite graphene, 44,45 nanoflakes, [46][47][48] nanoribbons, [49][50][51] and also in infinite TMD layers [38][39][40] and flakes. 41,42 The plaquette configuration has been analyzed in 2D graphene, 50,52-54 triangular flakes, 47,48 and carbon nanotubes.…”

Section: 37mentioning

confidence: 99%

Symmetries and hybridization in the indirect interaction between magnetic moments inMoS2nanoflakes

2016

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We study the Ruderman-Kittel-Kasuya-Yosida interaction between magnetic impurities embedded in p-doped transition metal dichalcogenide triangular flakes. The role of underlying symmetries is exposed by analyzing the interaction as a function of impurity separation along zigzag and armchair trajectories, in specific parts of the sample. The large spin-orbit coupling in these materials produces strongly anisotropic interactions, including a Dzyaloshinskii-Moriya component that can be sizable and tunable. We consider impurities hybridized to different orbitals of the host transition-metal and identify specific characteristics for onsite and hollow site adsorption. In the onsite case, the different components of the interaction have similar magnitude, while for the hollow site, the Ising component dominates. We also study the dependence of the interaction with the level of hole doping, which supplies a further degree of tunability. Our results could provide ways of controlling helical long range spin order in magnetic impurity arrays embedded in these materials.

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Section: 37mentioning

confidence: 99%

Symmetries and hybridization in the indirect interaction between magnetic moments inMoS2nanoflakes

2016

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“…This has been studied on finite two-dimensional (2D) materials, such as graphene nanoflakes [19,20] and nanoribbons [21][22][23][24][25], where impurities lie close to or on zigzag and armchair edges. On graphene, RKKY interactions with a dominant 1D character have been identified for impurities near the sample edges [25] and line defects [26].…”

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confidence: 99%

Noncollinear exchange interaction in transition metal dichalcogenide edges

2016

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We study the Ruderman-Kittel-Kasuya-Yosida effective exchange interaction between magnetic impurities embedded on the edges of transition metal dichalcogenide flakes, using a three-orbital tight-binding model. Electronic states lying midgap of the bulk structure have a strong one-dimensional (1D) character, localized on the edges of the crystallite. This results in exchange interactions with 1/r (or slower) decay with distance r, similar to other 1D systems. Most interestingly, however, the strong spin-orbit interaction in these materials results in sizable noncollinear Dzyaloshinskii-Moriya interactions between impurities, comparable in size to the usual Ising and in-plane components. Varying the relevant Fermi energy by doping or gating may allow one to modulate the effective interactions, controlling the possible helical ground state configurations of multiple impurities.

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“…The geometry is presented in Fig.1. The flake electronic structure is modeled using a tight-binding Hamiltonian for pz electrons, supplemented with a Kondo impurity term [18]:…”

Section: Statement Of the Problemmentioning

confidence: 99%

Indirect Interaction in Graphene Nanostructures

Konobeeva¹,

Белоненко²

2018

J. Nano- Electron. Phys.

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In this paper, the form of the indirect interaction between local impurities in flakes and in graphene ring is analytically investigated. We calculate this characteristic in the framework of the tight-binding model for a finite nanocarbon system with periodic boundary conditions. A pronounced dependence of the bond value on the impurity position inside the graphene sample is found, which is due to quantum size effects. The influence of the flake size on the value of the indirect interaction constant is also studied.

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Indirect RKKY interaction between localized magnetic moments in armchair graphene nanoribbons

Cited by 21 publications

References 65 publications

Symmetries and hybridization in the indirect interaction between magnetic moments inMoS2nanoflakes

Symmetries and hybridization in the indirect interaction between magnetic moments inMoS2nanoflakes

Noncollinear exchange interaction in transition metal dichalcogenide edges

Indirect Interaction in Graphene Nanostructures

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