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The non-equilibrium Greens function (NEGF) formalism provides a powerful conceptual and computational framework for treating quantum transport in nanodevices. It goes beyond the Landauer approach for ballistic, non-interacting electronics to include inelastic scattering and strong correlation effects at an atomistic level.
Check out Supriyo Datta's NEGF page for more information, or browse through the various resources listed below.
Dissipative Quantum Transport in Semiconductor Nanostructures
28 Dec 2011 | Papers | Contributor(s): Peter Greck
In this work, we investigate dissipative quantum transport properties of an open system. After presenting the background of ballistic quantum transport calculations, a simple scattering mechanism,...
Green's Functions Method Explained
10 Aug 2011 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This is a tutorial on non-equilibrium Green's functions.
Tutorial 4: Far-From-Equilibrium Quantum Transport
29 Mar 2011 | Courses | 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...
Tutorial 4a: High Bias Quantum Transport in Resonant Tunneling Diodes
29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck
Resonant Tunneling Diodes - NEMO1D: Motivation / History / Key Insights
Open 1D Systems: Transmission through Double Barrier Structures - Resonant Tunneling
Introduction to RTDs:...
23 Feb 2011 | Tools | Contributor(s): Anisur Rahman, Jing Wang, Jing Guo, Md. Sayed Hasan, Yang Liu, Akira Matsudaira, Shaikh S. Ahmed, Supriyo Datta, Mark Lundstrom
Calculate the ballistic I-V characteristics for conventional MOSFETs, Nanowire MOSFETs and Carbon NanoTube MOSFETs
OMEN Nanowire: solve the challenge
05 Feb 2011 | Teaching Materials | Contributor(s): SungGeun Kim
This document includes a challenging problems for OMEN Nanowire users. It challenges users to establish a nanowire transistor structure such that it satisfy the ITRS 2010 requirements.
Electron Density in a Nanowire
30 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, Saumitra Raj Mehrotra
Electron Density in a circular Silicon nanowire transistor.
OMEN Nanowire Homework Problems
24 Jan 2011 | Teaching Materials | Contributor(s): SungGeun Kim
OMEN Nanowire homework problems: anyone who has gone through the first-time user guide of OMEN Nanowire and done the examples in the guide should be able to run simulations in these homework...
OMEN Nanowire Test Problems
This test is for students who have gone through the OMEN Nanowire first-time user guide and other learning materials related to nanowire FETs.
Inelastic Scattering in NEGF: Matlab Implementation and Exercises
02 Jan 2011 | Downloads | Contributor(s): Samiran Ganguly, Supriyo Datta
A set of Matlab scripts has been developed illustrating the treatment of inelastic scattering in non-equilibrium Greens function (NEGF) based quantum transport models. The first script highlights...
Lecture 3: Introduction to NEGF
08 Sep 2010 | Online Presentations | Contributor(s): Supriyo Datta
“Electronics from the Bottom Up” is an educational initiative designed to bring a new perspective to the field of nano device engineering. It is co-sponsored by the Intel Foundation and the...
Surface scattering: Made simple
03 Sep 2010 | Papers | Contributor(s): Dmitri Nikonov, Himadri Pal
Surface scattering in a quantum well.
ANGEL - A Nonequilibrium Green Function Solver for LEDs
07 Jun 2010 | Tools | Contributor(s): sebastian steiger
An MPI-parallelized implementation of 1-D NEGF for heterostructures. Includes off-diagonal scattering. Effective mass band structure for electrons and holes. The online tool only provides basic...
Resonant Tunneling Diode operation
22 Apr 2010 | Animations | 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...
Nanotechnology Animation Gallery
22 Apr 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
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....
Nonequilibrium Green’s functions theory: Transport and optical gain in THz quantum cascade lasers
26 Mar 2010 | Online Presentations | Contributor(s): Tillmann Christoph Kubis
Quantum cascade lasers (QCLs) are promising sources of coherent THz radiation. However, state of the art THz-QCLs are still limited to cryogenic temperatures. The charge transport in these QCLs is...
Nanoelectronic Modeling nanoHUB Demo 2: RTD simulation with NEGF
09 Mar 2010 | Online Presentations | 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...
Nanoelectronic Modeling nanoHUB Demo 1: nanoHUB Tool Usage with RTD Simulation with NEGF
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...
Nanoelectronic Modeling Lecture 26: NEMO1D -
NEMO1D demonstrated the first industrial strength implementation of NEGF into a simulator that quantitatively simulated resonant tunneling diodes. The development of efficient algorithms that...
Quantum transport in semiconductor nanostructures
04 Mar 2010 | Papers | Contributor(s): Tillmann Christoph Kubis
PhD thesis of Tillmann Christoph Kubis
The main objective of this thesis is to theoretically predict the stationary charge and spin transport in mesoscopic semiconductor quantum devices in the...