Tags: disorder

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  1. Jamming of Soft Frictionless Spheres

    23 Aug 2012 | | Contributor(s):: Siew La Pang, Ishan Srivastava, Timothy S Fisher

    Predicts the jammed microstructure of an ensemble of spheres of user-defined number and size distribution

  2. Nanoelectronic Modeling Lecture 41: Full-Band and Atomistic Simulation of Realistic 40nm InAs HEMT

    08 Jul 2010 | | Contributor(s):: Gerhard Klimeck, Neerav Kharche, Neophytos Neophytou, Mathieu Luisier

    This presentation demonstrates the OMEN capabilities to perform a multi-scale simulation of advanced InAs-based high mobility transistors.Learning Objectives:Quantum Transport Simulator Full-Band and Atomistic III-V HEMTs Performance Analysis Good Agreement with Experiment Some Open Issues...

  3. Nanoelectronic Modeling Lecture 35: Alloy Disorder in Nanowires

    07 Jul 2010 | | Contributor(s):: Gerhard Klimeck, Timothy Boykin, Neerav Kharche, Mathieu Luisier, Neophytos Neophytou

    This presentation discusses the consequences of Alloy Disorder in unstrained strained AlGaAs nanowiresRelationship between dispersion relationship and transmission in perfectly ordered wiresBand folding in Si nanowiresTranmisison in disordered wires – relationship to an approximate...

  4. Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots

    07 Jul 2010 | | Contributor(s):: Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineeringWhat happens when there is disorder?Concept of disorder in the local bandstructureConfiguration noise, concentration noise,...

  5. Nanoelectronic Modeling Lecture 33: Alloy Disorder in Bulk

    07 Jul 2010 | | Contributor(s):: Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses disorder in AlGaAs unstrained systems in bulk. Bandstructure of an ideal simple unit cellWhat happens when there is disorder?Concept of a supercellBand folding in a supercellBand extraction from the concept of approximate bandstructureComparison of alloy disorder...

  6. Valley splitting in strained silicon quantum wells modeled with 2 degree miscuts, step disorder, and alloy disorder

    14 Jan 2008 | | Contributor(s):: Neerav Kharche, marta prada, Timothy Boykin, Gerhard Klimeck

    Valley splitting (VS) in strained SiGe/Si/SiGe quantum wells grown on (001) and 2° miscut substrates is computed in a magnetic field. Calculations of flat structures significantly overestimate, while calculations of perfectly ordered structures underestimate experimentally observed VS. Step...

  7. Development of a Nanoelectronic 3-D (NEMO 3-D ) Simulator for Multimillion Atom Simulations and Its Application to Alloyed Quantum Dots

    14 Jan 2008 | | Contributor(s):: Gerhard Klimeck, Timothy Boykin

    Material layers with a thickness of a few nanometers are common-place in today’s semiconductordevices. Before long, device fabrication methods will reach a point at which the other two devicedimensions are scaled down to few tens of nanometers. The total atom count in such deca-nanodevices is...