4 papers · 1 filter
Optical Transitions at the Neutral and Charged Vacancies in Diamond
Mehdi Heidari Saani, Mohammad Ali Vesaghi, Keivan Esfarjani
We used the exact eigenvectors of the generalized Hubbard Hamiltonian solution to predict the transition intensities of the well known and transitions at the neutral an…
Exact solutions of generalized Hubbard Hamiltonian for diamond vacancies
Mehdi Heidari Saani, Mohammad Ali Vesaghi, Keivan Esfarjani
A new formalism to calculate electronic states of vacancies in diamond has been developed using many-body techniques.This model is based on prevoius molecular models but does not u…
Nonlinear charging, and transport times in doped nanotubes junctions
Keivan Esfarjani, Amir A. Farajian, Siu Tat Chui +1
The nonlinear capacitance in doped nanotube junctions is calculated self consistently. It decreases as a function of the applied bias when the latter becomes larger than the pseudo…
Realization of an ultra-high magnetic field on a nano-scale
S. T. Chui, J. -T. Wang, Li Zhou +2
In tunnel junctions of which at least one side is a ferromagnet, very large magnetic polarization change () and splitting of the spin up and spin down Fermi energy…