148 citations · 285 across the 14 of their papers we have counts for
6 papers · 1 filter
A theoretical investigation of ferromagnetic tunnel junctions with 4-valued conductances
Satoshi Kokado, Kikuo Harigaya
In considering a novel function in ferromagnetic tunnel junctions consisting of ferromagnet(FM)/barrier/FM junctions, we theoretically investigate multiple valued (or multi-level)…
STM observation of electronic wave interference effect in finite-sized graphite with dislocation-network structures
Yousuke Kobayashi, Kazuyuki Takai, Ken-ichi Fukui +4
Superperiodic patterns near a step edge were observed by STM on several-layer-thick graphite sheets on a highly oriented pyrolitic graphite substrate, where a dislocation network i…
STM observation of the quantum interference effect in finite-sized graphite
Yousuke Kobayashi, Kazuyuki Takai, Ken-ichi Fukui +4
Superperiodic patterns were observed by STM on two kinds of finite-sized graphene sheets. One is nanographene sheets inclined from a highly oriented pyrolitic graphite (HOPG) subst…
Novel Electronic States in Graphene Ribbons -Competing Spin and Charge Orders-
Atsushi Yamashiro, Yukihiro Shimoi, Kikuo Harigaya +1
In a nanographene ring with zigzag edges, the spin-polarized state and the charge-polarized state are stabilized by the on-site and the nearest neighbor Coulomb repulsions, U and V…
Competition between spin and charge polarized states in nanographene ribbons with zigzag edges
Atsushi Yamashiro, Yukihiro Shimoi, Kikuo Harigaya +1
Effects of the nearest neighbor Coulomb interaction on nanographene ribbons with zigzag edges are investigated using the extended Hubbard model within the unrestricted Hartree-Fock…
Theoretical study on novel electronic properties in nanographite materials
Kikuo Harigaya, Atsushi Yamashiro, Yukihiro Shimoi +8
Antiferromagnetism in stacked nanographite is investigated with using the Hubbard-type model. We find that the open shell electronic structure can be an origin of the decreasing ma…