Ryoen Shirasaki

Non-Abelian gauge field theory of the spin-orbit interaction and a perfect spin filter (2007)

Hatano, Naomichi, Shirasaki, Ryoen, Nakamura, Hiroaki

We point out that the Rashba and Dresselhaus spin-orbit interactions in two dimensions can be regarded as a Yang-Mills non-Abelian gauge field. The physical field generated by the gauge field gives...

Gap-mediated magnetization of a pseudo-one-dimensional system with a spin-orbit interaction (2006)

Hatano, Naomichi, Shirasaki, Ryoen, Nakamura, Hiroaki

We argue that a pseudo-one-dimensional electron gas is magnetized when a voltage bias is applied with the Fermi level tuned to be in the energy gap generated by a spin-orbit interaction. The...

Quantum Nernst Effect (2005)

Nakamura, Hiroaki, Hatano, Naomichi, Shirasaki, Ryoen

We report our recent predictions on the quantum Nernst effect, a novel thermomagnetic effect in the quantum Hall regime. We assume that, when the chemical potential is located between a pair of...

Quantum Nernst Effect (2005)

Nakamura, Hiroaki, Hatano, Naomichi, Shirasaki, Ryoen

It is theoretically predicted that the Nernst coefficient is strongly suppressed and the thermal conductance is quantized in the quantum Hall regime of the two-dimensional electron gas. The Nernst...

擬一次元水素結合性結晶の電子格子系モデル (1997)

白崎, 良演, 中川, 奈都子, 寺井, 章, シラサキ, リョウエン, ナカガワ, ナツコ, テライ, アキラ, ...

The hydrogen bond system is investigated using the electron-lattice model in which the interaction between the molecule and the hydrogen in the nearest neighbor one is considered as the Coulomb...

Isotope Effect on the Formation Energy of Soliton in t-Polyacetylene (1995)

Shirasaki, Ryoen

The formation energy of a soliton was derived in the TLM model to be 2\Delta_{0}/\pi which is independent of the masses of the polymer atoms. We estimate effects of the electron-phonon coupling on...

Effects of the Lattice Discreteness on a Soliton in the Su-Schrieffer-Heeger Model (1995)

Shirasaki, Ryoen

In this paper we analytically study the effects of the lattice discreteness on the electron band in the SSH model. We propose a modified version of the TLM model which is derived from the SSH model...