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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.
MCW07 Modeling Molecule-Assisted Transport in Nanotransistors
out of 5 stars
06 Nov 2007 | | Contributor(s):: Kamil Walczak
Molecular electronics faces many problems in practical device implementation, due to difficulties with fabrication and gate-ability. In these devices, molecules act as the main conducting channel. One could imagine alternate device structures where molecules act as quantum dots rather than...
MCW07 Simple Models for Molecular Transport Junctions
13 Sep 2007 | | Contributor(s):: , Abraham Nitzan, Mark Ratner
We review our recent research on role of interactions in molecular transport junctions. We consider simple models within nonequilibrium Green function approach (NEGF) in steady-state regime.
MCW07 Modeling Charging-based Switching in Molecular Transport Junctions
23 Aug 2007 | | Contributor(s):: Sina Yeganeh, , Mark Ratner
We will discuss several proposed explanations for the switching and negative differential resistance behavior seen in some molecular junctions. It is shown that a proposed polaron model is successful in predicting both hysteresis and NDR behavior, and the model is elaborated with image charge...
Introduction to FETToy
03 Jul 2007 | | Contributor(s):: James K Fodor, Jing Guo
This learning module introduces nanoHUB users to the FETToy simulator. A brief introduction to FETToy is presented, followed by voiced presentations featuring the simulator in action. Upon completion of this module, users should be able to use this simulator to gain valuable insight into the...
Introduction to nanoMOS
02 Jul 2007 | | Contributor(s):: James K Fodor, Jing Guo
This learning module introduces nanoHUB users to the nanoMOS simulator. A brief introduction to nanoMOS is presented, followed by voiced presentations featuring the simulator in action. Upon completion of this module, users should be able to use this simulator to gain valuable insight into the...
NEGF Formulism Question
Open | Responses: 1
I’m not too familiar with the NEGF formalism. But had a very basic question.
I’ve read that NEGF can be viewed as a “Quantum Boltzmann Equation”. When...
In the time-dependent NEGF equation, given a sigma_in(t,t’) due to the dot, I am getting
an I-V equation that is making it difficult for me to group terms. For instance, looking at...
What I want to do is building an aluminum quantum dot coupled to
aluminum leads to observe Coulomb Blockade. To form the tunnel barriers
we oxidize the Al in a plasma without any detailed...
Multi-gate Nanowire FET
18 May 2007 | | Contributor(s):: Mincheol Shin
3D simulator for silicon nanowire field effect transistors with multiple gates
Atomistic Green's Function Method 1-D Atomic Chain Simulation
16 Apr 2007 | | Contributor(s):: Zhen Huang, Wei Zhang, Timothy S Fisher, Sridhar Sadasivam
Calculation of Thermal Conductance of an Atomic Chain
BNC Annual Research Symposium: Nanoscale Energy Conversion
23 Apr 2007 | | Contributor(s):: Timothy S Fisher
This presentation is part of a collection of presentations describing the projects, people, and capabilities enhanced by research performed in the Birck Center, and a look at plans for the upcoming year.
13 Mar 2006 | | Contributor(s):: Neophytos Neophytou, Shaikh S. Ahmed, POLIZZI ERIC, Gerhard Klimeck, Mark Lundstrom
Simulates ballistic transport properties in 3D Carbon NanoTube Field Effect Transistor (CNTFET) devices
Highly Efficient Thermal Transport: The Application of Carbon Nanotube Array Interfaces
01 Feb 2007 | | Contributor(s):: Baratunde A. Cola
Carbon nanotubes (CNTs) have received much attention in recent years for their extraordinary properties that through careful engineering may be leverage for the development of numerous advantageous applications. However, to date, only few CNT based applications exist in the market place. So when...
McCoy Lecture: Nanodevices and Maxwell's Demon
04 Oct 2006 | | Contributor(s):: Supriyo Datta
This is a video taped live lecture covering roughly the same material as lecture 1 of "Concepts of Quantum Transport". Video only.
CQT Lecture 4: Coulomb blockade and Fock space
30 Nov 2006 | | Contributor(s):: Supriyo Datta
Objective: To illustrate the limitations of the model described in Lectures 2, 3 and introduce a completely different approach based on the concept of Fock space. I believe this will be a key concept in the next stage of development of transport physics.
CQT Lecture 3: Probabilities, Wavefunctions and Green Functions
Objective: To extend the simple model from Lecture 2 into the full-blown model combines the NEGF (Non-Equilibrium Green Function) method with the Landauer approach.
CQT Lecture 2: Electrical Resistance - A Simple Model
Objective:To introduce a simple quantitative model for describing current flow in nanoscalestructures and relate it to well-known large scale properties like Ohm’s Law.
CQT Lecture 1: Nanodevices and Maxwell's Demon
Objective: To illustrate the subtle interplay of dynamics and thermodynamicsthat distinguishes transport physics.
A short overview of this series of four lectures is given.