Results
repositories = "Linköping University Electronic Press"
> : "Physics"
(x)
Electronic Transport in Polymeric Solar Cells and Transistors
Author(s) :
Andersson, Lars Mattias
Description :
The main topic of this dissertation is electronic charge transport in polymeric and molecular organic materials and material blends intended for solar cell applications. Charge transport in polymers is a strange beast and carrier mobility is rarely a well-defined number. Measurements on different sa...
Repository :
Linköping University Electronic Press
Language(s) :
English
Ab initio studies of Al, O, and O2 adsorption on α-Al2O3 (0001) surfaces
Author(s) :
Wallin, Erik
,
Andersson, Jon Martin
,
Münger, E. Peter
,
Chirita, Valeriu
,
Helmersson, Ulf
Description :
The interactions of Al, O, and O2 with different α- Al2O3 (0001) surfaces have been studied using ab initio density functional theory methods. All three surface terminations obtainable by cleaving the bulk structure [single Al-layer (AlO), double Al-layer (AlAl), and O terminations] have been consid...
Repository :
Linköping University Electronic Press
Language(s) :
English
Spin polarization in modulation-doped GaAs quantum wires
Description :
We study spin polarization in a split-gate quantum wire focusing on the effect of a realistic smooth potential due to remote donors. Electron interaction and spin effects are included within the density functional theory in the local spin density approximation. We find that depending on the electron...
Repository :
Linköping University Electronic Press
Language(s) :
English
Si-based structures for light emission and detection
Author(s) :
Karim, Amir
Description :
Efforts to improve the optical performance of the indirect bandgap semiconductor silicon (Si) has been a major subject of research in the field of Si photonics due to the promising applications of Si based light emitters and detectors for optical communication. With that motivation three different S...
Repository :
Linköping University Electronic Press
Language(s) :
English
Growth and Characterization of AlN : From Nano Structures to Bulk Material
Author(s) :
Yazdi, Gholamreza
Description :
Aluminum nitride (AlN) exhibits a large direct band gap, 6.2 eV, and is thus suitable forsolid state white-light-emitting devices. It is capable in spintronics because of its high Curietemperature if doped with transition metals. AlN can also be used as a buffer layer for growth ofdevice-grade GaN a...
Repository :
Linköping University Electronic Press
Language(s) :
English
Synthesis of α-Al2O3 thin films using reactive high power impulse magnetron sputtering
Description :
α-alumina coatings have been deposited directly onto cemented-carbide and Mo substrates at a temperature as low as 650 °C using reactive high-power impulse magnetron sputtering (HiPIMS) of Al in an Ar/O2 gas mixture. The coatings consisted of plate-like crystallites, as revealed by scanning electron...
Repository :
Linköping University Electronic Press
Language(s) :
English
Quantum Chaos On A Curved Surface Kvantkaos på krökt yta
Author(s) :
Wärnå, John
Description :
The system studied in the thesis is a particle in a two-dimensional box on the surface of a sphere with constant radius. The different systems have different radii while the box dimension is kept the same, so the curvature of the surface of the box is different for the different systems. In a system...
Repository :
Linköping University Electronic Press
Language(s) :
English
Phase stability of Ti2AlC upon oxygen incorporation: A first-principles investigation
Description :
The phase stability of Ti2AlC upon oxygen incorporation has been studied by means of first-principles calculations. Recent experimental observations of this so-called MAX phase (M = early transition metal, A = A-group element, and X = C or N) show that the characteristic nanolaminated structure is r...
Repository :
Linköping University Electronic Press
Language(s) :
English
Increased electromechanical coupling in w-ScxAl1-xN
Author(s) :
Wingqvist, Gunilla
,
Tasnadi, Ferenc
,
Zukauskaite, Agne
,
Birch, Jens
,
Arwin, Hans
,
Hultman, Lars
Description :
AlN is challenged as the material choice in important thin film electroacoustic devices for modern wireless communication applications. We present the promise of superior electromechanical coupling (kt2), in w−ScxAl1−xN by studying its dielectric properties. w−ScxAl1−xN (0≤x≤0.3) thin films grown by...
Repository :
Linköping University Electronic Press
Language(s) :
English
Study of Radiation Damage of Lead Tungstate Crystals in the Context of CMS ECAL
Author(s) :
Edström, Daniel
Description :
The Large Hadron Collider, LHC, at CERN is capable of producing proton-proton collisions at a total energy of 14 TeV. Four principal detectors are installed in the LHC to detect the various particles created in the collisions. In one of these detectors, the CMS, scintillating crystals of lead tungst...
Repository :
Linköping University Electronic Press
Language(s) :
English