Tags: NEGF

Description

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.

All Categories (101-120 of 214)

  1. Lecture 2: Graphene Fundamentals

    Online Presentations | 22 Sep 2009 | Contributor(s):: Supriyo Datta

  2. Lecture 2A: Quantum Transport

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To extend the simple model from Lectures 1 into the full-fledged Non-equilibrium Green’s Function (NEGF) – Landauer model by introducing a spatial grid of N points and turning numbers like into (NxN) matrices like , with incoherent scattering introduced through . This model will be...

  3. Lecture 2B: Quantum Transport

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To extend the simple model from Lectures 1 into the full-fledged Non-equilibrium Green’s Function (NEGF) – Landauer model by introducing a spatial grid of N points and turning numbers like into (NxN) matrices like , with incoherent scattering introduced through . This model will be...

  4. Lecture 3: Introduction to NEGF

    Online Presentations | 08 Sep 2010 | Contributor(s):: Supriyo Datta

  5. Lecture 3: Low Bias Transport in Graphene: An Introduction

    Online Presentations | 18 Sep 2009 | Contributor(s):: Mark Lundstrom

    Outline:Introduction and ObjectivesTheoryExperimental approachResultsDiscussionSummaryLecture notes are available for this lecture.

  6. Lecture 3A: Spin Transport

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To extend the model from Lectures 1 and 2 to include electron spin. Every electron is an elementary “magnet” with two states having opposite magnetic moments. Usually this has no major effect on device operation except to increase the conductance by a factor of two.But it is now...

  7. Lecture 3B: Spin Transport

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To extend the model from Lectures 1 and 2 to include electron spin. Every electron is an elementary “magnet” with two states having opposite magnetic moments. Usually this has no major effect on device operation except to increase the conductance by a factor of two.But it is now...

  8. Lecture 4A: Energy Exchange and Maxwell's Demon

    Online Presentations | 02 Sep 2008 | Contributor(s):: Supriyo Datta

    Objective: To incorporate distributed energy exchange processes into the previous models from lectures 1 through 3 which are based on a "Landauer-like picture" where the Joule heating associated with current flow occurs entirely in the two contacts.Although there is experimental evidence that...

  9. Lecture 4B: Energy Exchange and Maxwell’s Demon

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To incorporate distributed energy exchange processes into the previous models from lectures 1 through 3 which are based on a “Landauer-like picture” where the Joule heating associated with current flow occurs entirely in the two contacts.Although there is experimental evidence that...

  10. Lecture 5A: Correlations and Entanglement

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To relate the one-electron picture used throughout these lectures to the more general but less tractable many-particle picture that underlies it. We introduce this new viewpoint using the example of Coulomb blockaded electronic devices that are difficult to model within the picture...

  11. Lecture 5B: Correlations and Entanglement

    Online Presentations | 20 Aug 2008 | Contributor(s):: Supriyo Datta

    Objective: To relate the one-electron picture used throughout these lectures to the more general but less tractable many-particle picture that underlies it. We introduce this new viewpoint using the example of Coulomb blockaded electronic devices that are difficult to model within the picture...

  12. 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

  13. Logic Devices and Circuits on Carbon Nanotubes

    Online Presentations | 05 Apr 2006 | Contributor(s):: Joerg Appenzeller

    Over the last years carbon nanotubes (CNs) have attracted an increasing interest as building blocks for nano-electronics applications. Due to their unique properties enabling e.g. ballistic transport at room-temperature over several hundred nanometers, high performance CN field-effect transistors...

  14. Low Bias Transport in Graphene: An Introduction (lecture notes)

    Presentation Materials | 22 Sep 2009 | Contributor(s):: Mark Lundstrom, tony low, Dionisis Berdebes

    These notes complement a lecture with the same title presented by Mark Lundstrom and Dionisis Berdebes, at the NCN@Purdue Summer School, July 20-24, 2009.

  15. Magnetic Tunnel Junction Lab

    Tools | 23 Sep 2013 | Contributor(s):: Samiran Ganguly, Deepanjan Datta, Chen Shang, Sankarsh Ramadas, Sayeef Salahuddin, Supriyo Datta

    Calculate Resistance, Tunneling Magneto Resistance, Spin Torques, and Switching characteristics of a Magnetic Tunnel Junction

  16. Mahesh R Neupane

    Though Mahesh hails from Nepal, he graduated with a Bachelors of Engineering (BE)degree in Computer Science from University of Madras, India, in 2003. In 2005, he received a MS degree in Computer...

    https://nanohub.org/members/38579

  17. Matdcal

    Tools | 30 Jan 2008 | Contributor(s):: Kirk Bevan

    Non-equilibrium Green's Function Density Functional Theory Simulator

  18. MATLAB codes from the "Lessons from Nanoelectronics"

    Downloads | 09 Jul 2012 | Contributor(s):: Supriyo Datta

    The .zip archive contains all the codes from the book.You can download and unzip the file to access the codes organized in folders (titled by the Lecture number).You can run this on MATLAB or use the OCTAViEw tool on nanoHUB.

  19. MATLAB codes from "Nanoscale device modeling: the Green's function method"

    Downloads | 09 Oct 2013 | Contributor(s):: Supriyo Datta

    The MATLAB programs used to generate the figures in the article that appeared in Superlattices and Microstructures, vol.28, p.253 (2000).

  20. MATLAB Scripts for "Quantum Transport: Atom to Transistor"

    Downloads | 15 Mar 2005 | Contributor(s):: Supriyo Datta

    Tinker with quantum transport models! Download the MATLAB scripts used to demonstrate the physics described in Supriyo Datta's book Quantum Transport: Atom to Transistor. These simple models are less than a page of code, and yet they reproduce much of the fundamental physics observed in...