227 citations · 408 across the 17 of their papers we have counts for
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Photoluminescence quantum efficiency of Er optical centers in GaN epilayers
V. X. Ho, T. V. Dao, H. X. Jiang +4
We report the quantum efficiency of photoluminescence processes of Er optical centers as well as the thermal quenching mechanism in GaN epilayers prepared by metal-organic chemical…
Excitation Mechanisms of Er Optical Centers in GaN Epilayers
D. K. George, M. Hawkins, M. McLaren +4
We report direct evidence of two mechanisms responsible for the excitation of optically active Er3+ ions in GaN epilayers grown by metal-organic chemical vapor deposition. These me…
Weak ferromagnetism of antiferromagnetic domains in graphene with defects
Y. G. Semenov, J. M. Zavada, K. W. Kim
Magnetic properties of graphene with randomly distributed magnetic defects/vacancies are studied in terms of the Kondo Hamiltonian in the mean field approximation. It has been show…
Electron spin relaxation in carbon nanotubes
Y. G. Semenov, J. M. Zavada, K. W. Kim
The long standing problem of inexplicably short spin relaxation in carbon nanotubes (CNTs) is examined. The curvature-mediated spin-orbital interaction is shown to induce fluctuati…
Electrically Controlled Magnetic Memory and Programmable Logic based on Graphene/Ferromagnet Hybrid Structures
Y. G. Semenov, J. M. Zavada, K. W. Kim
It has been shown that the combining of the electrical effect on the exchange bias field with giant magneto-resistance effect of the graphene/ferromagnet hybrid structures reveals…
Electrical Control of Exchange Bias Mediated by Graphene
Y. G. Semenov, J. M. Zavada, K. W. Kim
The role of graphene in mediating the exchange interaction is theoretically investigated when it is placed between two ferromagnetic dielectric materials. The calculation based on…