Influence of shallow traps on time-resolved
optically stimulated luminescence measurements
of Al2O3:C,Mg
G. Denis, M. S. Akselrod, and E. G. Yukihara
The authors investigate the influence of shallow traps on the signals from Al2O3:C,Mg obtained using time-resolved optically stimulated luminescence (TR-OSL) measurements through experiments and numerical simulations. Both experimental results and simulations show that the OSL signals during and between the stimulation pulses are affected by the presence of shallow traps. However, with an appropriate choice of timing parameters, the influence of shallow traps can be reduced by calculating the difference between the signals during and between stimulation pulses. The experimental results also show evidence of thermal assistance in the OSL process of Al2O3:C,Mg.
J. Appl. Phys. 109, 104906 (2011)
Resonant transport through graphene nanoribbon quantum dots
Yong-Jian Xiong and Bao-Ku Xiong
The transport properties of armchair graphene nanoribbons with two structural nanoconstrictions are studied by atomistic simulations. With the appropriate geometry and size, the central region between the two constrictions can behave as a single tunneling quantum dot. Within the low energy range around the Dirac point, the conductance of the structure shows strong resonances that are related to the quasi-bound states localized in the dot. The quasi-bound states are associated with the standing waves confined by the two constrictions, and can be effectively modulated by the geometric parameters of the structure.
J. Appl. Phys. 109, 103707 (2011)
Two-bit-per-dot patterned media combining in-plane and perpendicular-to-plane magnetized thin films
J. Moritz, G. Vinai, S. Auffret, and B. Dieny
This study demonstrates that the best way to achieve a 2-bit-per-dot media involves stacking in-plane and perpendicular-to-plane magnetic media atop each dot. The perpendicularly magnetized layer can be read right above the dot, whereas the in-plane magnetized layer can be read between dots. This enables doubling of the areal density for a given dot size by taking better advantage of the whole patterned media area. (Quoted by engadget)
J. Appl. Phys. 109, 083902 (2011)
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