Find information on common issues.
Ask questions and find answers from other users.
Suggest a new site feature or improvement.
Check on status of your tickets.
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.
Sign of imaginary part of self-energy for hole Hamiltonian
Closed | Responses: 0
Prof Datta in his QTAT Exercise Ch8, discusses that the imaginary part of the contact self-energy should be negative while the real part will tend towards zero for large energies in both directions. …
Jul 12 2010
2010 NCN@Purdue Summer School: Electronics from the Bottom Up
This year’s summer school will have two components: a focus on nanoelectronic devices, with an introduction to spintronics and, second, tutorials on selected topics in nanotechnology. First, we use …
Jun 30 2010
Registraton Deadline: 2009 NCN@Purdue Summer School: Electronics from the Bottom Up
ANGEL - A Nonequilibrium Green Function Solver for LEDs
Ranking is calculated from a formula comprised of user reviews and usage data. Learn more ›
18 Jan 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
09 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
20 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
24 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
01 Feb 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 potential …
Nanoelectronic Modeling Lecture 26: NEMO1D -
02 Mar 2010 | Online Presentations | 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 …
Quantum transport in semiconductor nanostructures
03 Mar 2010 | Publications | 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 …
ECET 499N Lecture 5a: Nanoelectronics III - Datta Lecture Review
18 Feb 2010 | Online Presentations | Contributor(s): Helen McNally
Tillmann Christoph Kubis
Nanoelectronic Modeling Lecture 22: NEMO1D - Motivation, History and Key Insights
05 Feb 2010 | Online Presentations | 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, …
Nanoelectronic Modeling Lecture 21: Recursive Green Function Algorithm
The Recursive Green Function (RGF) algorithms is the primary workhorse for the numerical solution of NEGF equations in quasi-1D systems. It is particularly efficient in cases where the device is …
ANGEL - A Nonequilibrium Green's Function Solver for LEDs
06 Feb 2010 | Downloads | Contributor(s): sebastian steiger
Introducing ANGEL, a Nonequilibrium Green’s Function code aimed at describing LEDs. ANGEL uses a description close to the classic NEMO-1D paper (Lake et al., JAP 81, 7845 (1997)) to model quantum …
ECE 495N: Fundamentals of Nanoelectronics Lecture Notes (Fall 2009)
03 Feb 2010 | Teaching Materials | Contributor(s): Mehdi Salmani Jelodar, Supriyo Datta (editor)
Lecture notes for the Fall 2009 teaching of ECE 495: Fundamentals of Nanoelectronics.
Nanoelectronic Modeling Lecture 20: NEGF in a Quasi-1D Formulation
25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Samarth Agarwal, Zhengping Jiang
This lecture will introduce a spatial discretization scheme of the Schrödinger equation which represents a 1D heterostructure like a resonant tunneling diode with spatially varying band edges and …
Nanoelectronic Modeling Lecture 19: Introduction to RTDs - Asymmetric Structures
25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck
This lecture explores this effect in more detail by targeting an RTD that has a deliberate asymmetric structure. The collector barrier is chosen thicker than the emitter barrier. With this set-up …
Nanoelectronic Modeling Lecture 17: Introduction to RTDs - Relaxation Scattering in the Emitter
Realistic RTDs will have nonlinear electrostatic potential in their emitter. Typically a triangular well is formed in the emitter due to the applied bias and the emitter thus contains discrete quasi …
nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies.