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We present absolute doubly differential cross sections (DDCS) of electron emission (⩽∼12 keV, 20°–160°) in collisions of 6.0 and 10.0 MeV/u He 2+ ions with water vapor, in which unexpectedly large DDCS values were observed at the backward angles, particularly in the high-energy region, as well as singly differential cross sections larger than the Rudd model by a factor of 2–3 at ∼10 keV. The...
We measured the in-plane photocurrent of a self-assembled In 0.4 Ga 0.6 As/GaAs(311)B quantum dot (QD) superlattice. A<space>significant negative differential conductance (NDC) was found signifying an metal-insulator transition. The metal phase before NDC is argued arising from the miniband transport, which is likely controlled by acoustic-phonons scattering...
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