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A Matlab 1D-Poisson-NEGF simulator for 2D FET
Downloads | 04 Mar 2024 | Contributor(s):: Chien-Ting Tung
A Matlab 1D-Poisson-NEGF solver to calculate a 2D FET where the channel is only one atom thick. It assumes the channel thickness is only one point and solves the 1D Poisson and NEGF self-consistently.It also utilizes a Fermi-Dirac integral table from...
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ABACUS Tool Suite and Bandstructure and Band Models (Fall 2023)
Online Presentations | 22 Aug 2023 | Contributor(s):: Gerhard Klimeck
In the third session, Dr. Klimeck will give a brief overview of ABACUS and demonstrate several bandstructure tools. With these, students can explore the Standard Periodic Potential aka Kronig-Penney model as well as bandstructure formation by transmission through finite barriers....
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ABACUS Bandstructure Models (Spring 2022)
Online Presentations | 05 May 2022 | Contributor(s):: Gerhard Klimeck
In the third session, Dr. Klimeck will give a brief overview of ABACUS and demonstrate several bandstructure tools. With these, students can explore the Standard Periodic Potential aka Kronig-Penney model as well as bandstructure formation by transmission through finite barriers....
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Introduction to Quantum Transport
Papers | 30 Jan 2022 | Contributor(s):: Supriyo Datta
Everyone is familiar with the amazing performance of a modern smartphone, powered by a billion-plus nanotransistors, each having an active region that is barely a few hundred atoms long. The same amazing technology has also led to a deeper understanding of the nature of current flow and heat...
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ABACUS Bandstructure Models (Winter 2021)
Online Presentations | 21 Dec 2021 | Contributor(s):: Gerhard Klimeck
In the third session, Dr. Klimeck will give a brief overview of ABACUS and demonstrate several bandstructure tools. With these, students can explore the Standard Periodic Potential aka Kronig-Penney model as well as bandstructure formation by transmission through finite barriers...
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IWCN 2021: How to Preserve the Kramers-Kronig Relation in Inelastic Atomistic Quantum Transport Calculations
Online Presentations | 15 Jul 2021 | Contributor(s):: Daniel Alberto Lemus, James Charles, Tillmann Christoph Kubis
The nonequilibrium Green’s function method (NEGF) is often used to predict quantum transport in atomically resolved nanodevices. This yields a high numerical load when inelastic scattering is included. Atomistic NEGF had been regularly applied on nanodevices, such as nanotransistors....
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IWCN 2021: Interfacial Trap Effects in InAs Gate-all-around Nanowire Tunnel Field- Effect Transistors: First-Principles-Based Approach
Online Presentations | 15 Jul 2021 | Contributor(s):: Hyeongu Lee, SeongHyeok Jeon, Cho Yucheol, Mincheol Shin
In this work, we investigated the effects of the traps, Arsenic dangling bond (AsDB) and Arsenic anti-site (AsIn) traps, in InAs gate-all-around nanowire TFETs, using the trap Hamiltonian obtained from the first-principles calculations. The transport properties were treated by nonequilibrium...
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IWCN 2021: Ab initio Quantum Transport Simulation of Lateral Heterostructures Based on 2D Materials: Assessment of the Coupling Hamiltonians
Online Presentations | 14 Jul 2021 | Contributor(s):: Adel Mfoukh, Marco Pala
Lateral heterostructures based on lattice-matched 2D materials are a promising option to design efficient electron devices such as MOSFETs [1], tunnel-FETs [2] and energy-filtering FETs [3]. In order to rigorously describe the transport through such heterostructures, an ab-initio approach based...
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IWCN 2021: Thermoelectric Properties of Complex Band and Nanostructured Materials
Online Presentations | 14 Jul 2021 | Contributor(s):: Neophytos Neophytou, Patrizio Graziosi, Vassilios Vargiamidis
In this work, we describe a computational framework to compute the electronic and thermoelectric transport in materials with multi-band electronic structures of an arbitrary shape by coupling density function theory (DFT) bandstructures to the Boltzmann Transport Equation (BTE).
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Recursive algorithm for NEGF in Python GPU version
Downloads | 02 Feb 2021 | Contributor(s):: Ning Yang, Tong Wu, Jing Guo
This folder contains two Python functions for GPU-accelerated simulation, which implements the recursive algorithm in the non-equilibrium Green’s function (NEGF) formalism. Compared to the matlab implementation [1], the GPU version allows massive parallel running over many cores on GPU...
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Compact NEGF-Based Solver for Double-Gate MOSFETs
Tools | 17 Nov 2020 | Contributor(s):: Fabian Hosenfeld, Alexander Kloes
Fast simulation of the DC current in a nanoscale double-gate MOSFET including thermionic emission and source-to-drain tunneling current.
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Atomistic Green’s Functions: The Beauty of Self-energies
Online Presentations | 28 Oct 2020 | Contributor(s):: Tillmann Christoph Kubis
This presentation gives an introduction to NEGF. It will be explained how self-energies cause NEGF to fundamentally differ from most other quantum methods. Atomistic examples of phonon and impurity scattering self-energies agree quantitatively with experiments.
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Bandgap Manipulation of Armchair Graphene nanoribbon
Papers | 01 Sep 2020 | Contributor(s):: Lance Fernandes
Bandgap Manipulation is very important for various applications. Optical Devices need smaller Bandgap where as Diode's need larger Bandgap. Armchair graphene Nanoribbon (AGNR) has a special property where if the numbers of atoms are multiple of three or multiple of three plus one, they are...
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Transition to Atomic Wire Electrode Actuates Gold-thiol Spin Valve
Papers | 04 Aug 2020 | Contributor(s):: Avinash Prakash
In resemblance of the mechanically-controlled break junction, we considered the molecule 1,4-benzenedithiol (1,4-BDT) making ohmic contacts with gold in three distinct configurations of the gold electrodes. Simulations of non-equilibrium charge transport within density functional theory,...
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Bandstructure Effects in Nano Devices With NEMO: from Basic Physics to Real Devices and to Global Impact on nanoHUB.org
Online Presentations | 08 Mar 2019 | Contributor(s):: Gerhard Klimeck
This presentation will intuitively describe how bandstructure is modified at the nanometer scale and what some of the consequences are on the device performance.
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Biswajit Pabi
https://nanohub.org/members/197649
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Niger Sultana Mimi
Self motivated learner.
https://nanohub.org/members/185634
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Non-linear Poisson eq. convergence issue for self-consistent calculation in NEGF
Q&A|Closed | Responses: 0
Hi,
I was working on Prof. S. Datta's code (https://nanohub.org/resources/19564) for 1D diode. I find the convergence rate is highly sensitive to the initial guess, although...
https://nanohub.org/answers/question/1888
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NEMO5, a Parallel, Multiscale, Multiphysics Nanoelectronics Modeling Tool: From Basic Physics to Real Devices and to Global Impact on nanoHUB.org
Online Presentations | 10 Nov 2016 | 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 computational approaches. NEMO5’s general software framework easily includes any kind of...
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NEMO5, a Parallel, Multiscale, Multiphysics Nanoelectronics Modeling Tool
Online Presentations | 19 Sep 2016 | 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 computational approaches. NEMO5’s general software framework easily includes any kind of...