Essays about: "tight-binding"

Showing result 21 - 25 of 27 essays containing the word tight-binding.

  1. 21. Graphene – A Two-Dimensional Dirac Material

    University essay from KTH/Teoretisk fysik

    Author : Danny Liu; Johan Wicklund; [2014]
    Keywords : ;

    Abstract : Graphene is a two-dimensional material, whose popularity has soared in both condensedmatter physics and material science the past decade. Due to its unique properties, graphene can be used in a vast array of new and interesting applications that could fundamentally change the material industry. READ MORE

  3. 22. Effects of electron-electron interaction in pristine and doped graphene

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Faluke Aikebaier; [2014]
    Keywords : ;

    Abstract : The goal of this master thesis is to investigate the eect of electron-electron interaction on electronic properties of graphene that can be measured experimentally. A tight-binding model, which includes up to next-nearest-neighbor hopping, with parameters tted to density functional theory calculations, has been used to describe the electronic structure of graphene. READ MORE

  4. 23. Laser direct joining of CFRP and aluminum

    University essay from KTH/Industriell produktion

    Author : Jennifer Hägg; [2012]
    Keywords : ;

    Abstract : Behovet av lätta konstruktioner ökar och nya lättare material används. Dessa behöver fogas samman. Att använda fogning med laser är ett sätt att göra detta och i detta examensarbete utvärderas fogning med laser av kolfiberkomposit (CFRP) och aluminium. READ MORE

  5. 24. Curvature-Induced Energy Band Tilting in Finite-Length Carbon Nanotubes

    University essay from Institutionen för fysik

    Author : Anton Vikström; [2011]
    Keywords : carbon nanotubes; graphene; Dirac cone; condensed matter; velocity asymmetry; tilting; kolnanorör; grafen; Dirac-kon; kondenserade materien; hastighetsasymmetri; lutning;

    Abstract : The near-Fermi-energy energy band structure of carbon nanotubes is given by cross-sections of the graphene Dirac cones near the K and K' points. Using second-order perturbation theory and a nearest-neighbor approximated tight-binding model, curvature-induced corrections to the graphene-based effective model are derived. READ MORE

  6. 25. Strain Effects on Electrical Properties of Suspended Graphene

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Anderson David Smith; [2011]
    Keywords : ;

    Abstract : Graphene is an extraordinary material which shows tremendous potential as a replacement for silicon in many electronic applications. However, one major drawback to graphene is its zero band gap. Previous research in tight binding models have predicted band gap opening in graphene under tensile strain. READ MORE