Search for dissertations about: "electronic band structure"

Showing result 1 - 5 of 235 swedish dissertations containing the words electronic band structure.

  1. 1. Formation stability and electronic structure of surfaces and interfaces from first principles

    Author : Jochen Rohrer; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; band structure; van der Waals interaction; electronic structure; graphane; graphene; atomic structure; growth; thin film; interface; density functional theory; CVD; Alumina; nucleation;

    Abstract : This thesis deals with two closely interwoven aspects of first-principle(density functional theory) materials modeling:(1)~prediction of atomic structure & chemical composition,and (2)~prediction of electronic properties.In the first part, we focus on atomic structure (AS) and chemical composition (CC) of surface and interface systems. READ MORE

  2. 2. Electronic Structure of Some Zincblende Semiconductor Surfaces

    Author : Yousef Omar Khazmi; Chalmers University of Technology; []
    Keywords : CdTe; valence band; InP; tight-binding; core level; superlattice; surface; Green s function; adsorbates; semiconductor; GaAs; photoemission; electronic structure;

    Abstract : The main aim of this thesis is to study and understand the surface electronic structure of compound semiconductors (ex. GaAs, InP, ..etc. READ MORE

  3. 3. Structural, Electronic and Mechanical Properties of Advanced Functional Materials

    Author : Muhammad Ramzan; Rajeev Ahuja; S. K. Saxena; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; DFT; Hydrogen storage; Rechargeable batteries; Amorphization; Electronic structure; Crystal strcuture; Molecular dynamics; Diffusion; Intercalation voltage; High pressure; MAX phases; Mechanical properties; Optical properties; Phase change memory; Spintronics; Magnetism; Correlation effects; Band structure; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : The search for alternate and renewable energy resources as well as the efficient use of energy and development of such systems that can help to save the energy consumption is needed because of exponential growth in world population, limited conventional fossil fuel resources, and to meet the increasing demand of clean and environment friendly substitutes. Hydrogen being the simplest, most abundant and clean energy carrier has the potential to fulfill some of these requirements provided the development of efficient, safe and durable systems for its production, storage and usage. READ MORE

  4. 4. Analysis and Design of Low-Phase-Noise Integrated Voltage-Controlled Oscillators for Wide-Band RF Front-Ends

    Author : Ali Fard; Denny Åberg; John R. Long; Mälardalens högskola; []

    Abstract : The explosive development of wireless communication services creates a demand for more flexible and cost-effective communication systems that offer higher data rates. The obvious trend towards small-size and ultra low power systems, in combination with the ever increasing number of applications integrated in a single portable device, tightens the design constraints at hardware and software level. READ MORE

  5. 5. Electronic Transport in Materials

    Author : Velimir Meded; Susanne Mirbt; Ingrid Mertig; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Physics; Electronic Structure; Ab initio; Condensed Matter Theory; Hydrogen; Boltzmann Transport Equation; Magnetism; Alloys; Fysik; Physics; Fysik;

    Abstract : Transport properties within the Boltzmann transport equation for metallic multi-layer structures as well as bulk materials, were the prime topic of this work. Ab initio total energy calculations for Hydrogen loaded metallic multi-layers were performed in order to shed some light onto problem of H depleted layers at the interfaces that have been experimentally observed. READ MORE