Ambacher, O. et al. Two dimensional electron gases induced by spontaneous and piezoelectric polarization in undoped and doped AlGaN/GaN heterostructures. J. Appl. Phys. 87,...
Markets remain risk-averse
A frantic week in financial markets draws to a close and it’s clear that investors are feeling very anxious about carrying...
SES, the international communications satellite operator, plans to send two more C-band television broadcasting spacecraft into orbit from Cape Canaveral Friday night atop a...