207 citations · 247 across the 6 of their papers we have counts for
6 papers
Spin-polarized electronic structures and transport properties of Fe-Co alloys
Yohei Kota, Tomohiro Takahashi, Hiroki Tsuchiura +1
The electrical resistivities of Fe-Co alloys owing to random alloy disorder are calculated using the Kubo-Greenwood formula. The obtained electrical esistivities agree well with ex…
Ab-initio Study on the Magnetic Structures in the Ordered Mn3Pt Alloy
Yohei Kota, Hiroki Tsuchiura, Akimasa Sakuma
We study the electronic states of the magnetically ordered Mn3Pt alloy within the density functional theory. Mn3Pt has been believed that one third of Mn atoms have no magnetic mom…
Theoretical study of a localized quantum spin reversal by the sequential injection of spins in a spin quantum dot
Satoshi Kokado, Kazumasa Ueda, Kikuo Harigaya +1
This is a theoretical study of the reversal of a localized quantum spin induced by sequential injection of spins for a spin quantum dot that has a quantum spin. The system consists…
Decoherence processes of a quantum two-level system coupled to a fermionic environment
Naoyoshi Yamada, Akimasa Sakuma, Hiroki Tsuchiura
We study decoherence processes of an S = 1/2 localized spin coupled to conduction band electrons in a metal or a semiconductor via an Ising-like interaction. We derive master equat…
A theoretical analysis on highly spin-polarized transport of iron nitride Fe_4N
Satoshi Kokado, Nobuhisa Fujima, Kikuo Harigaya +2
In order to propose a ferromagnet exhibiting highly spin-polarized transport, we theoretically analyzed the spin polarization ratio of the conductivity of the bulk FeN with a p…
Microscopic description of Landau-Lifshitz-Gilbert type equation based on the s-d model
Akimasa Sakuma
A Landau-Lifshitz-Gilbert type equation has been derived by using s-d model in which the s-electron system is regarded as an environment coupled weakly with the localized spins. Ba…