Sökning: "Dirac point shift"

Hittade 2 uppsatser innehållade orden Dirac point shift.

1. 1. Electrical Characterizationon Commercially Available Chemical Vapor Deposition (CVD) Graphene

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

   Författare :Mikael Anttila-Eriksson; [2016]
   Nyckelord :GFET; Graphene; Dirac point shift; Charge carrier mobility;

   Sammanfattning : Field-effect transistors (FET) based on graphene as channel has extraordinaryproperties in terms of charge mobility, charge carrier density etc. However, there aremany challenges to graphene based FET due to the fact graphene is a monolayer ofatoms in 2-dimentional space that is strongly influenced by the operating conditions. LÄS MER

3. 2. Curvature-Induced Energy Band Tilting in Finite-Length Carbon Nanotubes

   Master-uppsats, Institutionen för fysik

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

   Sammanfattning : 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. LÄS MER