Tags: transport/quantum

Online Presentations (1-20 of 28)

  1. CQT Introduction

    30 Nov 2006 | | Contributor(s):: Supriyo Datta

    A short overview of this series of four lectures is given.

  2. CQT Lecture 1: Nanodevices and Maxwell's Demon

    30 Nov 2006 | | Contributor(s):: Supriyo Datta

    Objective: To illustrate the subtle interplay of dynamics and thermodynamicsthat distinguishes transport physics.

  3. CQT Lecture 2: Electrical Resistance - A Simple Model

    30 Nov 2006 | | Contributor(s):: Supriyo Datta

    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.

  4. CQT Lecture 3: Probabilities, Wavefunctions and Green Functions

    30 Nov 2006 | | Contributor(s):: Supriyo Datta

    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.

  5. 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.

  6. ECE 659 Lecture 38.0: Correlations and Entanglement

    04 May 2009 | | Contributor(s):: Supriyo Datta

    This lecture is from the series of lecturesNanoelectronics and the Meaning of Resistance.

  7. Engineering at the nanometer scale: Is it a new material or a new device?

    06 Nov 2007 | | Contributor(s):: Gerhard Klimeck

    This seminar will overview NEMO 3D simulation capabilities and its deployment on the nanoHUB as well as an overview of the nanoHUB impact on the community.

  8. Introduction: Nanoelectronics and the meaning of resistance

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

    This lecture provides a brief overview of the five-day short course whose purpose is to introduce a unified viewpoint for a wide variety of nanoscale electronic devices of great interest for all kinds of applications including switching, energy conversion and sensing. Our objective, however, is...

  9. Lecture 1A: What and where is the resistance?

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

    Objective: To introduce a simple quantitative model that highlights the essential parameters that determine electrical conduction: the density of states in the channel, D and the rates at which electrons hop in and out of the two contacts, labeled source and drain. This model is used to explain...

  10. Lecture 1B: What and where is the resistance?

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

    Objective: To introduce a simple quantitative model that highlights the essential parameters that determine electrical conduction: the density of states in the channel, D and the rates at which electrons hop in and out of the two contacts, labeled source and drain. This model is used to explain...

  11. Lecture 2A: Quantum Transport

    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...

  12. Lecture 2B: Quantum Transport

    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...

  13. Lecture 3A: Spin Transport

    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...

  14. Lecture 3B: Spin Transport

    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...

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

    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...

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

    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...

  17. Lecture 5A: Correlations and Entanglement

    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...

  18. Lecture 5B: Correlations and Entanglement

    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...

  19. Lecture 6: Quantum Transport in Nanoscale FETs

    12 Sep 2008 | | Contributor(s):: Mark Lundstrom

    The previous lessons developed an analytical (or almost analytical) theory of the nanoscale FET, but to properly treat all the details, rigorous computer simulations are necessary. This lecture presents quantum transport simulations that display the internal physics of nanoscale MOSFETs. We use...

  20. 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.