18 citations · 41 across the 8 of their papers we have counts for
8 papers
Direct Determination of Exciton Wave Function Amplitudes by the Momentum-Resolved Photo-Electron Emission Experiment
Hiromasa Ohnishi, Norikazu Tomita, Keiichiro Nasu
We study conceptional problems of a photo-electron emission (PEE) process from a free exciton in insulating crystals. In this PEE process, only the electron constituting the excito…
Instantaneous Intervalley Transition just at the Franck-Condon State in the Conduction Band of GaAs
Hiromasa Ohnishi, Norikazu Tomita, Keiichiro Nasu
We propose two possible quantum microscopic mechanisms for intervalley transitions just at the Franck-Condon state in GaAs. The first is the simultaneously combined coulombic elast…
Real time relaxation dynamics of macroscopically photo-excited electrons toward the Fermi degeneracy formation in the conduction band of semiconductors
Hiromasa Ohnishi, Norikazu Tomita, Keiichiro Nasu
Concerning with the recent experiment of time-resolved two-photon photo-emission spectral measurements on semiconductors (GaAs, InP), we theoretically study real time relaxation dy…
Thermal resonating Hartree-Bogoliubov theory based on the projection method
Seiya Nishiyama, Joao da Providencia, Hiromasa Ohnishi
We propose a rigorous thermal resonating mean-field theory (Res-MFT). A state is approximated by superposition of multiple MF wavefunctions (WFs) composed of non-orthogonal Hartree…
An attempt at a resonating mean-field theoretical description of thermal behavior of two-gap superconductivity
Seiya Nishiyama, Joao da Providencia, Constanca Providencia +1
The resonating mean-field theory (Res-MFT) has been applied and shown to effectively describe two-gap superconductivity (SC). Particularly at T=0 using a suitable chemical potentia…
Resonating mean-field theoretical approach to two-gap superconductivity with high-Tc
Seiya Nishiyama, Joao da Providencia, Constanca Providencia +1
In the recent paper (referred to as I), the resonating mean-field theory (Res-MFT) has been applied and shown to effectively describe the so-called two-gap superconductivity (SC).…