Results
repositories = "Linköping University Electronic Press"
> : "Physics"
(x)
Ab initio piezoelectricity and energy landscape of Y0.375Al0.625N Ab initio piezoelektricitet och energilandskap för Y0.375Al0.625N
Author(s) :
Tholander, Christopher
Description :
There is high industrial demand for materials with a high piezoelectrical response which are stable at high temperatures. A recent study on ScAlN has explained the microscopic origin of the increased piezoelectric response in the alloy and its effect on the energy landscape. Y is a promising candida...
Repository :
Linköping University Electronic Press
Language(s) :
English
CVD Growth of Silicon Carbide for High Frequency Applications
Author(s) :
Forsberg, Urban
Description :
Silicon Carbide (SiC) is an important wide band gap semiconductor with outstanding electronic properties. With figures of merit far better than silicon, SiC is believed to replace and outcompete silicon in many applications using high frequencies, high voltage and high temperatures. With the introdu...
Repository :
Linköping University Electronic Press
Language(s) :
English
Bias and temperature dependence of the escape processes in quantum dots-in-a-well infrared photodetectors
Author(s) :
Höglund, Linda
,
Holtz, Per-Olof
,
Pettersson, H.
,
Asplund, C.
,
Wang, Q.
,
Almqvist, S.
,
Smuk, S.
,
Petrini, E.
,
Andersson, J. Y.
Description :
The performance of quantum dots-in-a-well infrared photodetectors (DWELL IPs) has been studied by means of interband and intersubband photocurrent measurements as well as dark current measurements. Using interband photocurrent measurements, substantial escape of electrons from lower lying states in ...
Repository :
Linköping University Electronic Press
Language(s) :
English
Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors
Author(s) :
Höglund, Linda
,
Holtz, Per-Olof
,
Pettersson, H.
,
Asplund, C.
,
Wang, Q.
,
Malm, H.
,
Almqvist, S.
,
Petrini, E.
,
Andersson, J. Y.
Description :
Bias-mediated tuning of the detection wavelength within the infrared wavelength region is demonstrated for quantum dots-in-a-well and dots-on-a-well infrared photodetectors. By positioning the InAs quantum dot layer asymmetrically in an 8 nm wide In0.15Ga0.85As/GaAs quantum well, a shift in the peak...
Repository :
Linköping University Electronic Press
Language(s) :
English
Energy level scheme of an InAs/InGaAs/GaAs quantum dots-in-a-well infraredphotodetector structure
Author(s) :
Höglund, Linda
,
Karlsson, Fredrik
,
Holtz, Per-Olof
,
Pettersson, H.
,
Pistol, L.E.
,
Wang, Q.
,
Almqvist, S.
,
Asplund, C.
Description :
A thorough investigation of the energy level structure in a quantum-dots-in-a-well infrared photodetector has been performed employing different experimental techniques. From photoluminescence (PL) and PL excitation (PLE) spectroscopy an approximate energy level scheme of the conduction and valence ...
Repository :
Linköping University Electronic Press
Language(s) :
English
Growth and characterisation of InGaAs-based quantum dots-in-a-well infrared photodetectors
Author(s) :
Höglund, Linda
Description :
This thesis presents results from the development of quantum dot (QD) based infrared photodetectors (IPs). The studies include epitaxial growth of QDs, investigations of the structural, optical and electronic properties of QD-based material as well as characterisation of the resulting components. Me...
Repository :
Linköping University Electronic Press
Language(s) :
English
Microstructural characterization of alkali metal mediated high temperature reactions in mullite based refractories
Description :
Two types of refractory bricks were used in reaction tests with slag from a production kiln for iron ore pellet production. Electron microscopy was used to characterize morphological changes at the slag/brick interface and active chemical reactions. Phases such as kalsilite, nepheline and potassium ...
Repository :
Linköping University Electronic Press
Language(s) :
English
Experiments and Theoretical Modeling of Fullerene-like CNx and CPx Thin Film Structures
Author(s) :
Furlan, Andrej
Description :
This thesis concerns the materials science of carbon-based fullerene-like structures as a basis for the improvement of the applicability of FL-CNx protective thin films. In particular, structural origins of mechanical properties of FL-CNx coatings and water adsorption on their surface were investiga...
Repository :
Linköping University Electronic Press
Language(s) :
English
Multifunctional nanostructured Ti-Si-C thin films
Author(s) :
Eklund, Per
Description :
In this Thesis, I have investigated multifunctional nanostructured Ti-Si-C thin films synthesized by magnetron sputtering in the substrate-temperature range from room temperature to 900 °C. The studies cover high-temperature growth of Ti3SiC2 and Ti4SiC3, low-temperature growth of Ti-Si-C nanocompos...
Repository :
Linköping University Electronic Press
Language(s) :
English
Evaluation of the uncertainties in KAP-meter calibrations
Description :
This report was prepared in order to give more details to the uncertainty evaluation of the Kerma area product meter calibration procedure described in the paper: Larsson J P Persliden J Sandborg S and Alm Carlsson G 1996 Transmission ionization chambers for measurements of air collision kerma integ...
Repository :
Linköping University Electronic Press
Language(s) :
English