8,882 research outputs found
Charge Trap Memory Based on Few-Layered Black Phosphorus
Atomically thin layered two-dimensional materials, including transition-metal
dichacolgenide (TMDC) and black phosphorus (BP), (1) have been receiving much
attention, because of their promising physical properties and potential
applications in flexible and transparent electronic devices . Here, for the
first time we show non-volatile chargetrap memory devices, based on
field-effect transistors with large hysteresis, consisting of a few-layer black
phosphorus channel and a three dimensional (3D) Al2O3 /HfO2 /Al2O3 charge-trap
gate stack. An unprecedented memory window exceeding 12 V is observed, due to
the extraordinary trapping ability of HfO2. The device shows a high endurance
and a stable retention of ?25% charge loss after 10 years, even drastically
lower than reported MoS2 flash memory. The high program/erase current ratio,
large memory window, stable retention and high on/off current ratio, provide a
promising route towards the flexible and transparent memory devices utilising
atomically thin two-dimensional materials. The combination of 2D materials with
traditional high-k charge-trap gate stacks opens up an exciting field of
nonvolatile memory devices.Comment: 16 pages, 10 figures, 1 table. arXiv admin note: substantial text
overlap with arXiv:1407.7432 by other authors; text overlap with
arXiv:1505.04859 by other authors without attributio
Intruder level and deformation in the SD-pair shell model
The influence of the intruder level on nuclear deformation is studied within
the framework of the nucleon-pair shell model truncated to an SD-pair subspace.
The results suggest that the intruder level has a tendency to soften the
deformation and plays an important role in determining the onset of rotational
behavior.Comment: 2 input TeX files, 2 figures, submitted to Phys. Lett.
Measuring Overall Heterogeneity in Meta-Analyses: Application to CSF Biomarker Studies in Alzheimer’s Disease
The interpretations of statistical inferences from meta-analyses depend on the degree of heterogeneity in the meta-analyses. Several new indices of heterogeneity in meta-analyses are proposed, and assessed the variation/difference of these indices through a large simulation study. The proposed methods are applied to biomakers of Alzheimer’s disease
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