Zobrazeno 1 - 10
of 259
pro vyhledávání: '"Harigaya, Kikuo"'
Autor:
Kaneko, Tomoaki, Harigaya, Kikuo
Using a tight binding model, we theoretically study the electronic properties of zigzag boron-carbon-nitride (BCN) nanoribbons where the outermost C atoms of zigzag graphene nanoribbons are replaced with B and N atoms. We show that the flat bands and
Externí odkaz:
http://arxiv.org/abs/1305.5137
Autor:
Kaneko, Tomoaki, Harigaya, Kikuo
Publikováno v:
J. Phys. Soc. Jpn. 82 (2013) 044708
We theoretically study the electronic properties of BC2N nanoribbons with zigzag edges using a tight binding model. We show that the zigzag BC2N nanoribbons have the flat bands and edge states when atoms are arranged as B-C-N-C along the zigzag lines
Externí odkaz:
http://arxiv.org/abs/1211.0726
Presence of flat bands and edge states at the Fermi level in graphene nanoribbons with zigzag edges is one of the most interesting and attracting properties of nanocarbon materials but it is believed that they are quite fragile states and disappear w
Externí odkaz:
http://arxiv.org/abs/1209.0258
Publikováno v:
J. Phys. Soc. Jpn. 81 (2012) 024705 [open access]
We theoretically analyze the anisotropic magnetoresistance (AMR) effects of bcc Fe (+), fcc Co (+), fcc Ni (+), Fe$_4$N (-), and a half-metallic ferromagnet (-). The sign in each ( ) represents the sign of the AMR ratio observed experimentally. We he
Externí odkaz:
http://arxiv.org/abs/1111.4864
Autor:
Harigaya, Kikuo, Imamura, Hiroshi
Publikováno v:
JP Journal of Solids and Structures, Volume 5, Issue 3, Pages 143 - 151 (2011)
Bilayer graphene nanoribbon with zigzag edge is investigated with the tight binding model. Two stacking structures, alpha and beta, are considered. The band splitting is seen in the alpha structure, while the splitting in the wave number direction is
Externí odkaz:
http://arxiv.org/abs/1109.5650
Autor:
Harigaya, Kikuo
Publikováno v:
Journal of Computational and Theoretical Nanoscience, Volume 9, 347-350 (2012)
Possible magnetic properties are studied in the buckybowl molecules: the sumanene and a part of C_60. The Hubbard model is applied to the systems. We find that the molecular structure determines the magnetism in the sumanene. On the other hand, the e
Externí odkaz:
http://arxiv.org/abs/1105.0145
Publikováno v:
Journal of Superconductivity and Novel Magnetism, vol. 25, pp. 2723-2735 (2012)
Bilayer graphene nanoribbon with zigzag edge is investigated with the tight binding model. Two stacking structures, alpha and beta, are considered. The band splitting is seen in the alpha structure, while the splitting in the wave number direction is
Externí odkaz:
http://arxiv.org/abs/1102.5473
Publikováno v:
J. Phys. Soc. Jpn. 79 (2010) 114721-1 - 114721-24
We derive the spin-atomic vibration interaction $V_{\rm SA}$ and the spin-flip Hamiltonian $V_{\rm SF}$ of a single atomic spin in a crystal field. We here apply the perturbation theory to a model with the spin-orbit interaction and the kinetic and p
Externí odkaz:
http://arxiv.org/abs/1009.3634
Autor:
Ozsoy, Osman, Harigaya, Kikuo
Publikováno v:
Journal of Computational and Theoretical Nanoscience, Volume 8, 31-37 (2011)
This paper deals with the physics of monolayer graphite, with a particular focus on the electronics and structural properties. In contrast to the previous electronic band structure of doped single-walled carbon nanotube calculation, where just a ball
Externí odkaz:
http://arxiv.org/abs/1004.4035
Autor:
Harigaya, Kikuo
Publikováno v:
Journal of Computational and Theoretical Nanoscience, Volume 9, 645-648 (2012)
Nano-carbon materials are investigated intensively. In this paper, the edge-state in nanographene materials with zigzag edges is studied theoretically. In particular, while the inter-layer interactions are considered, we prove that edge states exist
Externí odkaz:
http://arxiv.org/abs/0904.4371