Graphene as a reversible spin manipulator of molecular magnets.

@article{Bhandary2011GrapheneAA,
  title={Graphene as a reversible spin manipulator of molecular magnets.},
  author={Sumanta Bhandary and Saurabh Ghosh and Heike C. Herper and Heiko Wende and Olle Eriksson and Biplab Sanyal},
  journal={Physical review letters},
  year={2011},
  volume={107 25},
  pages={
          257202
        }
}
One of the primary objectives in molecular nanospintronics is to manipulate the spin states of organic molecules with a d-electron center, by suitable external means. In this Letter, we demonstrate by first principles density functional calculations, as well as second order perturbation theory, that a strain induced change of the spin state, from S=1→S=2, takes place for an iron porphyrin (FeP) molecule deposited at a divacancy site in a graphene lattice. The process is reversible in the sense… 

Figures from this paper

Defect controlled magnetism in FeP/graphene/Ni(111)
TLDR
This study suggests a new way of manipulating molecular magnetism by defects in graphene, which has the potential to be explored in designing spin qubits to realize logic operations in molecular nanospintronics.
Spin switch in iron phthalocyanine on Au(111) surface by hydrogen adsorption.
TLDR
It is demonstrated that the local spin state of an individual iron phthalocyanine (FePc) molecule adsorbed on an Au(111) surface exhibits controllable switching by hydrogen adsorption, as evidenced by using first-principles calculations based on density functional theory.
Electronic and magnetic properties of CoPc and FePc molecules on graphene: the substrate, defect, and hydrogen adsorption effects.
TLDR
A detailed investigation of the electronic and spintronic properties of vertically stacked heterostructures formed by CoPc or FePc adsorbed on a monolayer of graphene under the influences of the gold substrate, vacancies in graphene, and extra atomic hydrogen coordination is performed.
Tuning electronic and magnetic properties of molecular networks on graphene
Graphene (Gr) consists in an atomic thick layer of carbon atoms close-packed in a honeycomb lattice, built up of two inequivalent hexagonal sublattices (Fig.1.a), and represents the closest
Mechanically-Controlled Reversible Spin Crossover of Single Fe-Porphyrin Molecules.
TLDR
Spin-crossover molecules are thought to be ideal systems for molecular spintronics when SCO can be precisely controlled at the single-molecule level, and it is found that the junctions feature a zero-bias resonance in molecular conductance associated with the Fe spin center.
Ferromagnetic Exchange Coupling between Fe Phthalocyanine and Ni(111) Surface Mediated by the Extended States of Graphene
The interface spin coupling mechanism is studied in a hybrid structure made of Fe phthalocyanine molecules sublimed in ultrahigh vacuum on graphene grown on the magnetic substrate Ni(111). By using
Graphene-Induced Magnetic Anisotropy of a Two-Dimensional Iron Phthalocyanine Network.
A single layer of flat-lying iron phthalocyanine (FePc) molecules assembled on graphene grown on Ir(111) preserves the magnetic moment, as deduced by X-ray magnetic circular dichroism from the Fe
Manipulation of spin state of iron porphyrin by chemisorption on magnetic substrates
One of the key factors behind the rapid evolution of molecular spintronics is the efficient realization of spin manipulation of organic molecules with a magnetic center. The spin state of such
Designing a mechanically driven spin-crossover molecular switch via organic embedding
TLDR
This work theoretically design a mechanical spin-switch device in which external strain triggers the intrinsic magneto-structural coupling of FeP through a purely organic embedding, and demonstrates experimentally feasible tensile strain to trigger a low-spin to high-spin crossover.
...
...

References

SHOWING 1-10 OF 18 REFERENCES
Magnetism From Fundamentals to Nanoscale Dynamics
Fields and Moments.- Electric Fields, Currents, and Magnetic Fields.- Magnetic Moments and their Interactions with Magnetic Fields.- Time Dependent Fields.- Polarized Electromagnetic Waves.- History
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 2010
DOI: 10.1038/ncomms1057
  • Nat. Commun J. Phys. Chem. Lett
  • 2010
J. Chem. Phys
  • J. Chem. Phys
  • 2002
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 2009
J. Am. Chem. Soc
  • J. Am. Chem. Soc
  • 2011
Nat. Mater
  • Nat. Mater
  • 2007
Nature Mater. Rev. Mod. Phys. Science
  • Nature Mater. Rev. Mod. Phys. Science
  • 2007
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 1994
For correspondence: Biplab.Sanyal@physics.uu.se
  • For correspondence: Biplab.Sanyal@physics.uu.se
...
...