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Tunneling in an Nanometer-Scaled Transistor
25 Jan 2011 | | Contributor(s):: Gerhard Klimeck, Mathieu Luisier, Neerav Kharche, George A. Howlett, Insoo Woo, David Ebert
Electrons tunneling through the gate of an ultra-scaled transistor.
Modeling the quantum dot growth in the continuum approximation
12 Jan 2011 | | Contributor(s):: Peter Cendula
Quantum dots can grow spontaneously during molecular beam epitaxy oftwo materials with different lattice parameters, Stranski-Krastanow growth mode.We study a mathematical model based on the continuum approximation of thegrowing layer in two dimensions. Nonlinear evolution equation is solved...
Nov 15 2010
2010 Joint NNIN/C & NCN Fall Workshop: Building a Collaborative Framework for Nanoscale Simulations
Oct 31 2010
2010 Joint NNIN/C & NCN Fall Workshop: Registration Deadline
Does nanoHUB’s online tools system support python modules outside Rappture? (Particulary SciPy/NumPy)
Open | Responses: 1
I’m in the process of developing a tool in Python and I’m thinking of moving the project on to nanoHUB with Rappture, but my current code makes extensive use of http://nanohub.org/answers/question/602
Solar Cells Operation and Modeling
19 Jul 2010 | | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This set of slides decribes the basic principles of operation of various generations on solar cells with emphasis to single crystalline solar cells. Next, semiconductor equations that describe the operation of a solar cell under simplified conditions is given. Finally, modeling of single...
Ripples and Warping of Graphene: A Theoretical Study
08 Jun 2010 | | Contributor(s):: Umesh V. Waghmare
We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked with a low energy branch of phonons that exhibits quadratic dispersion at long wave-lengths. Many...
Computer in Science Engineering: featuring nanoHUB.org
22 Apr 2010 |
The current issue of Computing in Science and Engineering focuses on cyber-enabled nanotechnology, and nanoHUB.org is featured extensively throughout.
Carbon nanotube bandstructure
22 Apr 2010 | | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
Carbon nanotubes are allotropes of carbon with a cylindrical nanostructure, and can be categorized into single-walled nanotubes (SWNT) and multi-walled nanotubes (MWNT). These cylindrical carbon molecules have novel properties that make them potentially useful in many nanotechnology...
Threshold voltage in a nanowire MOSFET
22 Apr 2010 | | Contributor(s):: Saumitra Raj Mehrotra, SungGeun Kim, Gerhard Klimeck
Threshold voltage in a metal oxide semiconductor field-effect transistor (better known as a MOSFET) is usually defined as the gate voltage at which an inversion layer forms at the interface between the insulating layer (oxide) and the substrate (body) of the transistor. A MOSFET is said to be...
Resonant Tunneling Diode operation
A resonant tunneling diode (RTD) is a type of diode with a resonant tunneling structure that allows electrons to tunnel through various resonant states at certain energy levels. RTDs can be fabricated using many different types of materials (such as III-V, type IV, II-VI semiconductors) and...
Nanotechnology Animation Gallery
Animations and visualization are generated with various nanoHUB.org tools to enable insight into nanotechnology and nanoscience. Click on image for detailed description and larger image download. Additional animations are also available Featured nanoHUB tools: Band Structure Lab. Carrier...
Comb Drive Levitation
19 Jan 2010 | | Contributor(s):: Fengyuan (Thomas) Li, jason clark
Model comb drive levitation effect with Schwarz-Christoffel based algorithm
Semiconductor Device Theory Exercises
out of 5 stars
30 Jul 2008 | | Contributor(s):: Dragica Vasileska, Gerhard Klimeck, Mark Lundstrom
This collection of problems should help the students to better understand Semiconductor Device Physics on a fundamental and more complex level. Crystal lattices and Miller indiciesFrom 1 well to 2 wells to 5 wells to periodic potentialsPeriodic potentials and bandstructureBandstructure...
Learning Module: Atomic Picture of Plastic Deformation in Metals
The main goal of this learning module is to introduce students to the atomic-level processes responsible for plastic deformation in crystalline metals and help them develop a more intuitive...
Nanoelectronic Modeling Lecture 22: NEMO1D - Motivation, History and Key Insights
05 Feb 2010 | | Contributor(s):: Gerhard Klimeck
The primary objective of the NEMO-1D tool was the quantitative modeling of high performance Resonant Tunneling Diodes (RTDs). The software tool was intended for Engineers (concepts, fast turn-around, interactive) and Scientists (detailed device anaysis). Therefore various degrees of...
Nanoelectronic Modeling Lecture 03: nanoHUB.org - Online Simulation and More
30 Dec 2009 | | Contributor(s):: Gerhard Klimeck
This presentation provides a brief overview of the nanoHUB capabilites, compares it to static web page delivery, highlights its technology basis, and provides a vision for future cyberinfrastructures in a system of federated HUBs powered by the HUBzero.org infrastructure.
Nanoelectronic Modeling Lecture 02: (NEMO) Motivation and Background
30 Dec 2009 | | Contributor(s):: Gerhard Klimeck, Dragica Vasileska
Fundamental device modeling on the nanometer scale must include effect of open systems, high bias, and an atomistic basis. The non-equilibrium Green Function Formalism (NEGF) can include all these components in a fundamentally sound approach and has been the basis for a few novel device...