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.

Online Presentations (1-20 of 71)

  1. NEMO5, a Parallel, Multiscale, Multiphysics Nanoelectronics Modeling Tool
: From Basic Physics to Real Devices and to Global Impact on nanoHUB.org

    10 Nov 2016 | Online Presentations | Contributor(s): Gerhard Klimeck

    The Nanoelectronic Modeling tool suite NEMO5 is aimed to comprehend the critical multi-scale, multi-physics phenomena and deliver results to engineers, scientists, and students through efficient...

    https://nanohub.org/resources/25281

  2. NEMO5, a Parallel, Multiscale, Multiphysics Nanoelectronics Modeling Tool


    19 Sep 2016 | Online Presentations | Contributor(s): Gerhard Klimeck

    The Nanoelectronic Modeling tool suite NEMO5 is aimed to comprehend the critical multi-scale, multi-physics phenomena and deliver results to engineers, scientists, and students through efficient...

    https://nanohub.org/resources/24932

  3. Atomistic Modeling of Nano Devices: From Qubits to Transistors

    13 Apr 2016 | Online Presentations | Contributor(s): Rajib Rahman

    In this talk, I will describe such a framework that can capture complex interactions ranging from exchange and spin-orbit-valley coupling in spin qubits to non-equilibrium charge transport in...

    https://nanohub.org/resources/23993

  4. Self-energies: Opening Doors for Nanotechnology

    07 Apr 2016 | Online Presentations | Contributor(s): Tillmann Christoph Kubis

    In this talk, it will be shown how the concept of self-energies can be used to interface all these fields into the same nanotechnology modeling framework. Self-energies are most commonly used in...

    https://nanohub.org/resources/23952

  5. Phonon Interactions in Single-Dopant-Based Transistors: Temperature and Size Dependence

    25 Nov 2015 | Online Presentations | Contributor(s): Marc Bescond, Nicolas Cavassilas, Salim Berrada

    IWCE 2015 presentation. in this work we investigate the dependence of electron-phonon scattering in single dopant-based nanowire transistor with respect to temperature and dimensions. we use...

    https://nanohub.org/resources/23096

  6. Mode Space Tight Binding Model for Ultra-Fast Simulations of III-V Nanowire MOSFETs and Heterojunction TFETs

    13 Nov 2015 | Online Presentations | Contributor(s): Aryan Afzalian, Jun Huang, Hesameddin Ilatikhameneh, Santiago Alonso Perez Rubiano, Tillmann Christoph Kubis, Michael Povolotskyi, Gerhard Klimeck

    IWCE 2015 presentation.  we explore here the suitability of a mode space tight binding algorithm to various iii-v homo- and heterojunction nanowire devices. we show that in iii-v materials,...

    https://nanohub.org/resources/23094

  7. Density Functional Tight Binding (DFTB) Modeling in the Context of Ultra-Thin Silicon-on-Insulator MOSFETs

    10 Oct 2015 | Online Presentations | Contributor(s): Stanislav Markov

    IWCE 2015 presentation. We investigate the applicability of density functional tight binding (DFTB) theory [1][2], coupled to non-equilibrium Green functions (NEGF), for atomistic simulations of...

    https://nanohub.org/resources/22908

  8. Non-Equilibrium Green's Function (NEGF): A Different Perspective

    18 Sep 2015 | Online Presentations | Contributor(s): Supriyo Datta

    The NEGF method was established in the 1960’s through the classic work of Keldysh and others [1] using the methods of many- body perturbation theory (MBPT) and this approach is widely used...

    https://nanohub.org/resources/22800

  9. Tutorial 4a: High Bias Quantum Transport in Resonant Tunneling Diodes

    29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

    Outline: Resonant Tunneling Diodes - NEMO1D: Motivation / History / Key Insights Open 1D Systems: Transmission through Double Barrier Structures - Resonant Tunneling Introduction to RTDs:...

    https://nanohub.org/resources/11043

  10. 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...

    https://nanohub.org/resources/9659

  11. 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...

    https://nanohub.org/resources/8708

  12. 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...

    https://nanohub.org/resources/8317

  13. Nanoelectronic Modeling nanoHUB Demo 1: nanoHUB Tool Usage with RTD Simulation with NEGF

    09 Mar 2010 | Online Presentations | 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...

    https://nanohub.org/resources/8318

  14. Nanoelectronic Modeling Lecture 26: NEMO1D -

    09 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...

    https://nanohub.org/resources/8596

  15. ECET 499N Lecture 5a: Nanoelectronics III - Datta Lecture Review

    19 Feb 2010 | Online Presentations | Contributor(s): Helen McNally

    https://nanohub.org/resources/8521

  16. Nanoelectronic Modeling Lecture 22: NEMO1D - Motivation, History and Key Insights

    07 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...

    https://nanohub.org/resources/8389

  17. Nanoelectronic Modeling Lecture 21: Recursive Green Function Algorithm

    07 Feb 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    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...

    https://nanohub.org/resources/8388

  18. Nanoelectronic Modeling Lecture 20: NEGF in a Quasi-1D Formulation

    27 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...

    https://nanohub.org/resources/8203

  19. Nanoelectronic Modeling Lecture 19: Introduction to RTDs - Asymmetric Structures

    27 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...

    https://nanohub.org/resources/8202

  20. Nanoelectronic Modeling Lecture 17: Introduction to RTDs - Relaxation Scattering in the Emitter

    27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    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...

    https://nanohub.org/resources/8200