Essays about: "phonon dispersion"

Found 3 essays containing the words phonon dispersion.

1. 1. Simulation study of phononic crystal structures

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Olivier Vizuete; [2017]
   Keywords : ;

   Abstract : Thermoelectric materials are important in today’s society with a variety of applications. The material properties that determinate the efficiency of a thermoelectric device are mostly constants. In order to develop more efficient thermoelectric devices new materials and solutions need to be made. READ MORE

3. 2. Studying Atomic Vibrations by Transmission Electron Microscopy

   University essay from Uppsala universitet/Materialteori

   Author : Sebastian Cardoch; [2016]
   Keywords : graphene; lammps; molecular dynamic simulations; phonon dispersion; airebo; empirical potential function; carbon isotopes; vibrations; vibrational properties; tem; transmission electron microscopy; msd; mean square displacement; phonons;

   Abstract : We employ the empirical potential function Airebo to computationally model free-standing Carbon-12 graphene in a classical setting. Our objective is to measure the mean square displacement (MSD) of atoms in the system for different average temperatures and Carbon-13 isotope concentrations. READ MORE

4. 3. Thermodynamic and electronic properties of niobium at finite temperatures

   University essay from Linköpings universitet/Teoretisk Fysik; Linköpings universitet/Tekniska fakulteten

   Author : Johan Tidholm; [2015]
   Keywords : Anharmonicity; Thermodynamic properties; Electronic properties; Niobium; Finite temperatures;

   Abstract : Niobium (Nb) is a fascinating element, that when it is in a solid state has remarkable properties. This is believed to be a result of its electronic configuration that has partially filled 4d and 5s sub-shells. Nb has a melting temperature of 2750 K, a high strength at high temperature, and a good wear resistance. READ MORE