Tunable ferromagnetism in assembled two dimensional triangular graphene nanoflakes.

@article{Li2012TunableFI,
  title={Tunable ferromagnetism in assembled two dimensional triangular graphene nanoflakes.},
  author={Xiaowei Li and Qian Wang},
  journal={Physical chemistry chemical physics : PCCP},
  year={2012},
  volume={14 6},
  pages={
          2065-9
        }
}
  • Xiaowei Li, Qian Wang
  • Published 18 January 2012
  • Materials Science, Physics
  • Physical chemistry chemical physics : PCCP
Triangular graphene nanoflakes (TGFs), due to their novel magnetic configurations, can serve as building blocks to design new magnetic materials. Based on spin polarized density functional theory, we show that the two dimensional (2D) structures composed of zigzag-edged TGFs linked by 1,3,5-benzenetriyl units (TGF(N)-C(6)H(3)) are ferromagnetic. Their magnetic moments can be tuned by changing the size and edge termination of TGFs, namely magnetic moments increase linearly with the size of TGFs… 
View on PubMed
people.vcu.edu
22 Citations
Background Citations
1

Figures and Tables from this paper

22 Citations

Citation Type

Citation Type

Magnetism of triangular nanoflakes with different compositions and edge terminations
Since the discovery of the giant magnetoresistance effect, extensive research has been devoted to finding new materials for spintronic devices. The hotly pursued nanostructure-based magnetic…
Designing Two-Dimensional Versatile Room-Temperature Ferromagnets via Assembling Large-Scale Magnetic Quantum Dots.
TLDR
2D magnetic semiconductors with an enhanced Curie temperature of up to 472 K can be realized through the strong p(d)-p direct exchange interaction between TZGDs and linkages, and the TZGD size and linkage can regulate the electronic and magnetic properties of TZ GD-based 2D ferromagnets.
Emerging chemical strategies for imprinting magnetism in graphene and related 2D materials for spintronic and biomedical applications.
TLDR
A systematic classification and physicochemical description of approaches leading to equip graphene with magnetic properties, including introduction of point and line defects into graphene lattices, spatial confinement and edge engineering, doping of graphene lattice with foreign atoms, and sp3 functionalization are discussed.
Magnetism in multivacancy graphene systems.
  • R. Faccio, Á. Mombrú
  • Materials Science
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2012
TLDR
It is concluded that the configuration arising in the construction of multivacancies in graphene can unambiguously indicate whether a magnetic response of the defected system is to be expected.
Hybrid superlattices of graphene and hexagonal boron nitride: A ferromagnetic semiconductor at room temperature
Carbon(C) doped hexagonal boron nitride(hBN) has been reported to be ferromagnetic at room temperature. Substitution by C in hexagonal boron nitride(hBN) leads to formation of graphene islands, which…
Collective All‐Carbon Magnetism in Triangulene Dimers†
TLDR
The on‐surface synthesis and a proof‐of‐principle experimental study of magnetism in covalently bonded triangulene dimers are presented and collective singlet–triplet spin excitations in the dimers revealed, demonstrating efficient intertriangulenes magnetic coupling.
Influence of the structural configuration on the stability and magnetism in multivacancy graphene systems
Nitrogen-doping induces tunable magnetism in ReS2
Transition metal dichalcogenides (TMDs) are promising for spintronic devices owing to their spin-orbit coupling and loss of inversion symmetry. However, further development was obstructed by their…
Power law statistics of rippled graphene nanoflakes
Graphene nanoflakes (GNFs) are predicted to possess novel magnetic, optical, and spintronic properties. They have recently been synthesized and a number of applications are being studied. Here we…
Contributions of magnetic properties in epitaxial copper-doped ZnO.
TLDR
It is demonstrated that the substitution of Cu for Zn and the presence of strong Cu(Zn)-O bonds are necessary for ferromagnetism while the [Cu( Zn)O4] clusters are detrimental to the ferromaggnetism.
...
1
2
3
...

References

SHOWING 1-10 OF 34 REFERENCES
Magnetism in graphene nanoislands.
TLDR
The shape of the island, the imbalance in the number of atoms belonging to the two graphene sublattices, the existence of zero-energy states, and the total and local magnetic moment are intimately related.
Electronic and magnetic properties of triangular graphene quantum rings
The graphene nanostructures allow the control of bandgaps and magnetic properties with size and shape[1-3]. In particular, the existence of a band of degenerate states near Fermi level of zigzag…
Graphene nanoFlakes with large spin.
TLDR
The principle of topological frustration can be used to introduce large net spin and interesting spin distributions in graphene and suggest an avenue to nanoscale spintronics through the sculpting of graphene fragments.
Structure, stability, edge states, and aromaticity of graphene ribbons.
TLDR
Graphene-nanoribbon edges are determined as a function of the hydrogen content of the environment by means of density functional theory and the existence of exotic edge electronic states and/or magnetism is rationalized in terms of simple concepts from organic chemistry.
Spintronic Properties of Zigzag-Edged Triangular Graphene Flakes
We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular graphene flakes have large magnetic moments which vary…
Emergence of magnetism in graphene materials and nanostructures
Magnetic materials and nanostructures based on carbon offer unique opportunities for future technological applications such as spintronics. This paper reviews graphene-derived systems in which…
Disorder-based graphene spintronics.
TLDR
It is demonstrated, using ab initio density functional theory and non-equilibrium Green's functions calculations, that it is possible to obtain perfect spin selectivity in doped graphene nanoribbons to produce a perfect spin filter.
Spin polarization and giant magnetoresistance effect induced by magnetization in zigzag graphene nanoribbons
We investigate spin-dependent electron transport through a zigzag graphene nanoribbon sample with two ferromagnetic strips deposit on two sides of the graphene ribbon. Our results show that, for the…
From graphene constrictions to single carbon chains
We present an atomic-resolution observation and analysis of graphene constrictions and ribbons with sub-nanometer width. Graphene membranes are studied by imaging side spherical aberration-corrected…
Energy gaps in graphene nanoribbons.
TLDR
The authors' ab initio calculations show that the origin of energy gaps for GNRs with armchair shaped edges arises from both quantum confinement and the crucial effect of the edges, which differs from the results of simple tight-binding calculations or solutions of the Dirac's equation based on them.
...
1
2
3
4
...