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NEMO5 Tutorial 6B: Device Simulation - Quantum Transport in GaSb/InAs Tunneling FET
Online Presentations | 16 Jul 2012 | Contributor(s):: Yu He
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Tunneling
Teaching Materials | 30 Jul 2011 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This set of slides describes the quantum-mechanical process for tunneling and how it is accounted for in modeling semiconductor devices. We explain WKB approximation, transfer matrix approach and the Tsu-Esaki formula for the calculation of the current.
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Outdoing Maxwell’s Demon: Taming Molecular Wildness
Online Presentations | 11 May 2011 | Contributor(s):: Dudley R. Herschbach
This talk describes these developments, illustrating means to analyze and control molecular trajectories and spatial orientation and to select rotational and vibrational states, with applications to elucidating chemical reaction dynamics.
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Additional Tutorials on Selected Topics in Nanotechnology
Workshops | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck, Umesh V. Waghmare, Timothy S Fisher, N. S. Vidhyadhiraja
Select tutorials in nanotechnology, a part of the 2010 NCN@Purdue Summer School: Electronics from the Bottom Up.
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Tutorial 4: Far-From-Equilibrium Quantum Transport
Courses | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck
These lectures focus on the application of the theories using the nanoelectronic modeling tools NEMO 1- D, NEMO 3-D, and OMEN to realistically extended devices. Topics to be covered are realistic resonant tunneling diodes, quantum dots, nanowires, and Ultra-Thin-Body Transistors.
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Tutorial 4a: High Bias Quantum Transport in Resonant Tunneling Diodes
Online Presentations | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck
Outline:Resonant Tunneling Diodes - NEMO1D: Motivation / History / Key InsightsOpen 1D Systems: Transmission through Double Barrier Structures - Resonant TunnelingIntroduction to RTDs: Linear Potential DropIntroduction to RTDs: Realistic Doping ProfilesIntroduction to RTDs: Relaxation Scattering...
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Tutorial 4c: Formation of Bandstructure in Finite Superlattices (Exercise Session)
Online Presentations | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck
How does bandstructure occur? How large does a repeated system have to be? How does a finite superlattice compare to an infinite superlattice?
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Tutorial 4d: Formation of Bandstructure in Finite Superlattices (Exercise Demo)
Online Presentations | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck
Demonstration of thePiece-Wise Constant Potential Barriers Tool.
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Tunneling in an Nanometer-Scaled Transistor
Animations | 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.
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Atomistic Modeling and Simulation Tools for Nanoelectronics and their Deployment on nanoHUB.org
Online Presentations | 16 Dec 2010 | Contributor(s):: Gerhard Klimeck
At the nanometer scale the concepts of device and material meet and a new device is a new material and vice versa. While atomistic device representations are novel to device physicists, the semiconductor materials modeling community usually treats infinitely periodic structures. Two electronic...
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ME 597 Lecture 1: Review of Quantum Tunneling/Introduction to STM
Online Presentations | 01 Sep 2010 | Contributor(s):: Ron Reifenberger
Topics:Quantum TunnelingThe STM – basic ideaRecommended Reading: See References below.
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Quantum Tunneling Exercise
Teaching Materials | 16 Jun 2010 | Contributor(s):: Gerhard Klimeck, Parijat Sengupta, Dragica Vasileska
Exercise BackgroundTunneling is fully quantum-mechanical effect that does not have classical analog. Tunneling has revolutionized surface science by its utilization in scanning tunneling microscopes. In some device applications tunneling is required for the operation of the device (Resonant...
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Resonant Tunneling Diode operation
Animations | 22 Apr 2010 | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
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...
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Simulation of the Spin Field Effect Transistors: Effects of Tunneling and Spin Relaxation on its Performance
Online Presentations | 05 Apr 2010 | Contributor(s):: Yunfei Gao
A numerical simulation of spin-dependent quantum transport for a spin field effect transistor(spinFET) is implemented in a widely used simulator nanoMOS. This method includes the effect of bothspin relaxation in the channel and the tunneling barrier between the source/drain and the channel....
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Nanoelectronic Modeling nanoHUB Demo 2: RTD simulation with NEGF
Online Presentations | 09 Mar 2010 | Contributor(s):: Gerhard Klimeck
Demonstration of resonant tunneling diode (RTD) simulation using the RTD Simulation with NEGF Tool with a Hartree potential model showing potential profile, charge densities, current-voltage characteristics, and resonance energies. Also demonstrated is a RTD simulation using a Thomas-Fermi...
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Nanoelectronic Modeling nanoHUB Demo 1: nanoHUB Tool Usage with RTD Simulation with NEGF
Online Presentations | 09 Mar 2010 | Contributor(s):: Gerhard Klimeck
Demonstration of running tools on the nanoHUB. Demonstrated is the RTD Simulation with NEGF Tool using a simple level-drop potential model and a more realistic device using a Thomas-Fermi potential model.
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Nanoelectronic Modeling Lecture 26: NEMO1D -
Online Presentations | 09 Mar 2010 | Contributor(s):: Gerhard Klimeck
NEMO1D demonstrated the first industrial strength implementation of NEGF into a simulator that quantitatively simulated resonant tunneling diodes. The development of efficient algorithms that simulate scattering from polar optical phonons, acoustic phonons, alloy disorder, and interface roughness...
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Nanoelectronic Modeling Lecture 12: Open 1D Systems - Transmission through Double Barrier Structures - Resonant Tunneling
Online Presentations | 27 Jan 2010 | Contributor(s):: Gerhard Klimeck, Dragica Vasileska
This presentation shows that double barrier structures can show unity transmission for energies BELOW the barrier height, resulting in resonant tunneling. The resonance can be associated with a quasi bound state, and the bound state can be related to a simple particle in a box calculation.
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ME 597 Lecture 3: Quantum Tunneling/The STM
Online Presentations | 08 Oct 2009 | Contributor(s):: Ron Reifenberger
Topics:Quantum TunnelingThe STM – basic ideaRecommended Reading: See References below.
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Lecture 6: Graphene PN Junctions
Online Presentations | 22 Sep 2009 | Contributor(s):: Mark Lundstrom
Outline:IntroductionElectron optics in grapheneTransmission across NP junctionsConductance of PN and NN junctionsDiscussionSummary