The impact of defect scattering on the quasi-ballistic transport of nanoscale conductors

2015 ◽  
Vol 117 (8) ◽  
pp. 084319 ◽  
Author(s):  
I. S. Esqueda ◽  
C. D. Cress ◽  
Y. Cao ◽  
Y. Che ◽  
M. Fritze ◽  
...  
Keyword(s):  
Ballistic Transport ◽  
The Impact ◽  
Nanoscale Conductors

Effects of Roughness Scattering in Carrier Transport of Near Ballistic Silicon NanoWire MOSFET

2014 ◽  
Vol 573 ◽  
pp. 201-208 ◽  
Author(s):  
I.Sheik Arafat ◽  
N.B. Balamurugan ◽  
C. Priya
Keyword(s):  
Carrier Transport ◽  
Transport Model ◽  
Silicon Nanowire ◽  
Ballistic Transport ◽  
Proposed Model ◽  
Scattering Effects ◽  
Current Voltage ◽  
The Impact ◽  
Silicon Nanowire Mosfet ◽  
Nanowire Mosfet

– In this paper, we have investigated the Scattering effects in Carrier Transport of Near-ballistic SiNW MOSFET, which incorporates elastic scattering, optical phonon emission and its combination with Roughness Scattering. Current–voltage (I–V) characteristics of Proposed model is compared with Natori’s Ballistic and Quasi-Ballistic Transport model. We study the impact of Surface Roughness in the device leads on the current variability of a Gate-All-Around (GAA) SiNW MOSFET, which shows a remarkable decrease in electric current, mobility variation and transconductance because of scattered mobility. Analog parameters like the transconductance (gm), the transconductance generation factor (gm/Id), the early voltage (VA) have also been investigated. Effectiveness of the proposed model has been confirmed by comparing the analytical results with the TCAD simulation results.

The Impact of Gas Phase and Surface Chemical Reactions on Step Coverage in Lpcvd

1993 ◽  
Vol 334 ◽  
Author(s):  
Gregory B. Raupp ◽  
Timothy S. Cale
Keyword(s):  
Gas Phase ◽  
Chemical Reactions ◽  
Ballistic Transport ◽  
Film Surface ◽  
Wafer Surface ◽  
Process Conditions ◽  
Surface Chemical ◽  
Step Coverage ◽  
Surface Chemical Reactions ◽  
The Impact

AbstractThe characteristic step coverage behavior which a given LPCVD process exhibits depends on the nature of the controlling gas phase and/or surface chemical reactions. Physically-based ballistic transport and reaction film profile evolution simulation has provided a structure wherein the origins of step coverage limitations can be understood in the context of the interaction of transport and the controlling chemistry. Based on comparisons of the simulations to literature and in-house experimental data, we have categorized LPCVD mechanisms into one of three types. In heterogeneous deposition, conformal step coverage can usually be found under at least some process conditions. Step coverage typically degrades with increasing deposition temperature. In homogeneous precursor-mediateddeposition, a reactive intermediate is formed in the gas-phase above the wafer surface, resulting in poor to moderate step coverage. Step coverage may or may not degrade with increasing temperature. In byproduct-inhibited deposition, a gas-phase byproduct generated via a surface reaction readsorbs on the growing film surface and slows the deposition rate, yielding a poor to moderate, relatively temperature-insensitive step coverage. Poor step coverage is manifested in a marked film thickness discontinuity at the feature mouth, with a relatively uniform film down the feature sidewalls.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

Asteroid and Comet Impact Speeds upon Mars: Significance for Panspermia and the Supply of Organics

1997 ◽  
Vol 161 ◽  
pp. 197-201 ◽  
Author(s):  
Duncan Steel
Keyword(s):  
Probability Distributions ◽  
Regions Of Interest ◽  
Significant Fraction ◽  
Organic Chemicals ◽  
Impact Speed ◽  
The Mean ◽  
The Impact

AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.

Sign in / Sign up

Export Citation Format

Share Document