Tags: quantum transport

Resources (181-200 of 213)

  1. Nanoelectronics and the Meaning of Resistance

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

    The purpose of this series of lectures is to introduce the "bottom-up" approach to nanoelectronics using concrete examples. No prior knowledge of quantum mechanics or statistical mechanics is assumed; however, familiarity with matrix algebra will be helpful for some topics.Day 1: What and where...

  2. ABACUS - Assembly of Basic Applications for Coordinated Understanding of Semiconductors

    16 Jul 2008 | | Contributor(s):: Xufeng Wang, Dragica Vasileska, Gerhard Klimeck

    One-stop-shop for teaching semiconductor device education

  3. Piece-Wise Constant Potential Barriers Tool

    30 Jun 2008 | | Contributor(s):: Xufeng Wang, Samarth Agarwal, Gerhard Klimeck, Dragica Vasileska, Mathieu Luisier, Jean Michel D Sellier

    Transmission and the reflection coefficient of a five, seven, nine, eleven and 2n-segment piece-wise constant potential energy profile

  4. Nano Carbon: From ballistic transistors to atomic drumheads

    14 May 2008 | | Contributor(s):: Paul L. McEuen

    Carbon takes many forms, from precious diamonds to lowly graphite. Surprisingly, it is the latter that is the most prized by nano physicists. Graphene, a single layer of graphite, can serve as an impenetrable membrane a single atom thick. Rolled up into a nanometer-diameter cylinder--a carbon...

  5. Matdcal

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

    Non-equilibrium Green's Function Density Functional Theory Simulator

  6. Introduction to Coulomb Blockade Lab

    31 Mar 2008 | | Contributor(s):: Bhaskaran Muralidharan, Xufeng Wang, Gerhard Klimeck

    The tutorial is based on the Coulomb Blockade Lab available online at Coulomb Blockade Lab. Students are introduced to the concepts of level broadening and charging energies in artificial atoms (single quantum dots) and molecules (coupled quantum dots).A tutorial level introduction to the...

  7. Coulomb Blockade Simulation

    05 Jul 2006 | | Contributor(s):: Xufeng Wang, Bhaskaran Muralidharan, Gerhard Klimeck

    Simulate Coulomb Blockade through Many-Body Calculations in a single and double quantum dot system

  8. Nanoelectronic Modeling: Multimillion Atom Simulations, Transport, and HPC Scaling to 23,000 Processors

    07 Mar 2008 | | Contributor(s):: Gerhard Klimeck

    Future field effect transistors will be on the same length scales as “esoteric” devices such as quantum dots, nanowires, ultra-scaled quantum wells, and resonant tunneling diodes. In those structures the behavior of carriers and their interaction with their environment need to be fundamentally...

  9. MCW07 A Quantum Open Systems Approach to Molecular-Scale Devices

    25 Feb 2008 | | Contributor(s):: Yongqiang Xue

    Experimental advances in electrically and optically probing individual molecules have provided new insights into the behavior of single quantum objects and their interaction with the nanoenvironments without requiring ensemble average. Molecular-scale devices are open quantum systems whose...

  10. MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules

    25 Feb 2008 | | Contributor(s):: Bhaskaran Muralidharan, owen miller, Neeti Kapur, Avik Ghosh, Supriyo Datta

    We first outline the qualitatively different physics involved in the charging-induced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting) self-consistent field (SCF) and the weakly coupled (strongly interacting) Coulomb Blockade (CB) regimes. The CB...

  11. Exploring Physical and Chemical control of molecular conductance: A computational study

    31 Jan 2008 | | Contributor(s):: Barry D. Dunietz

  12. Path Integral Monte Carlo

    13 Dec 2007 | | Contributor(s):: John Shumway, Matthew Gilbert

    Tool Description

  13. Application of the Keldysh Formalism to Quantum Device Modeling and Analysis

    14 Jan 2008 | | Contributor(s):: Roger Lake

    The effect of inelastic scattering on quantum electron transport through layered semi-conductor structures is studied numerically using the approach based on the non-equilibrium Green's function formalism of Keldysh, Kadanoff, and Baym. The Markov assumption is not made, and the energy...

  14. Electron-Phonon and Electron-Electron Interactions in Quantum Transport

    14 Jan 2008 | | Contributor(s):: Gerhard Klimeck

    The objective of this work is to shed light on electron transport through sub-micron semi-conductor structures, where electronic state quantization, electron-electron interactions and electron-phonon interactions are important. We concentrate here on the most developed vertical quantum device,...

  15. Can numerical “experiments” INSPIRE physical experiments?

    20 Dec 2007 | | Contributor(s):: Supriyo Datta

    This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of computational science and engineering.

  16. NanoElectronic MOdeling: NEMO

    20 Dec 2007 | | Contributor(s):: Gerhard Klimeck

    This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of computational science and engineering.Novel nanoelectronic devices such as quantum dots, nanowires, and ultra-scaled...

  17. Carrier Transport at the Nanoscale

    27 Nov 2007 | | Contributor(s):: Mark Lundstrom

    Fall 2007Note: A more current teaching of this course with online lectures is available as ECE 656: Electronic Transport in Semiconductors (Fall 2011).This is a course about how charge flows in semiconductors with an emphasis on transport at the nanoscale. After a brief review basic concepts,...

  18. 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.

  19. MCW07 Modeling Molecule-Assisted Transport in Nanotransistors

    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...

  20. 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.